diff --git a/backend/handlers/admin/custom_services.go b/backend/handlers/admin/custom_services.go
index 2cc9791..a6a5ae8 100644
--- a/backend/handlers/admin/custom_services.go
+++ b/backend/handlers/admin/custom_services.go
@@ -207,7 +207,8 @@ func CreateCustomService(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -321,7 +322,8 @@ func UpdateCustomService(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/admin/discount_campaigns.go b/backend/handlers/admin/discount_campaigns.go
index 08a5fb9..69cc411 100644
--- a/backend/handlers/admin/discount_campaigns.go
+++ b/backend/handlers/admin/discount_campaigns.go
@@ -216,7 +216,8 @@ func CreateDiscountCampaign(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -421,7 +422,8 @@ func UpdateDiscountCampaign(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/admin/patch_tests.go b/backend/handlers/admin/patch_tests.go
index 05fe14b..a46b430 100644
--- a/backend/handlers/admin/patch_tests.go
+++ b/backend/handlers/admin/patch_tests.go
@@ -5,6 +5,7 @@ import (
 	"crussell/internal/validators"
 	"database/sql"
 	"encoding/json"
+	"log"
 	"log/slog"
 	"net/http"
 	"strconv"
@@ -86,7 +87,8 @@ func CreatePatchTest(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -138,7 +140,8 @@ func UpdatePatchTest(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/auth/local.go b/backend/handlers/auth/local.go
index 7036582..a88b2fc 100644
--- a/backend/handlers/auth/local.go
+++ b/backend/handlers/auth/local.go
@@ -79,7 +79,8 @@ func RegisterHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -146,7 +147,8 @@ func RegisterHandler(w http.ResponseWriter, r *http.Request) {
 
 	// Validate email format
 	if err := validators.ValidateEmail(req.Email); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -316,7 +318,8 @@ func LoginHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -542,7 +545,8 @@ func GenerateVerificationCodeHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -589,7 +593,8 @@ func VerifyCodeHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/bookings/bookings.go b/backend/handlers/bookings/bookings.go
index 258c860..e30f7a2 100644
--- a/backend/handlers/bookings/bookings.go
+++ b/backend/handlers/bookings/bookings.go
@@ -1336,7 +1336,8 @@ func UpdateBookingServicesHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -2034,7 +2035,8 @@ if err := db.Conn.QueryRow(r.Context(), `SELECT COALESCE(SUM(amount), 0) FROM pa
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -2405,7 +2407,8 @@ func EditBookingHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -2575,7 +2578,8 @@ func ProgressBookingHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -2994,7 +2998,8 @@ func ConfirmBookingHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -3212,7 +3217,8 @@ func DeleteBookingHandler(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 		if err := validators.Validate.Struct(&req); err != nil {
-			http.Error(w, err.Error(), http.StatusBadRequest)
+			log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 			return
 		}
 		allowed := map[string]bool{
@@ -4149,7 +4155,8 @@ func AdminRescheduleBookingHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/bookings/manage.go b/backend/handlers/bookings/manage.go
index 15a2d8e..7ec463a 100644
--- a/backend/handlers/bookings/manage.go
+++ b/backend/handlers/bookings/manage.go
@@ -359,7 +359,8 @@ func AdminCreateBookingForUserHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -1287,7 +1288,8 @@ func RequestEditHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/bookings/reserve.go b/backend/handlers/bookings/reserve.go
index daed57d..330e33e 100644
--- a/backend/handlers/bookings/reserve.go
+++ b/backend/handlers/bookings/reserve.go
@@ -45,7 +45,8 @@ func ReserveSlotHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/payments/giftcards.go b/backend/handlers/payments/giftcards.go
index b67fb32..5902674 100644
--- a/backend/handlers/payments/giftcards.go
+++ b/backend/handlers/payments/giftcards.go
@@ -866,7 +866,8 @@ func BuyGiftCard(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := ValidateCardInfo(req.CardID, req.NewCardToken); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/payments/handlers.go b/backend/handlers/payments/handlers.go
index f767495..9c61a0d 100644
--- a/backend/handlers/payments/handlers.go
+++ b/backend/handlers/payments/handlers.go
@@ -322,7 +322,8 @@ func CreateTerminalPayment(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -330,12 +331,14 @@ func CreateTerminalPayment(w http.ResponseWriter, r *http.Request) {
 	// L5
 
 	if err := ValidateAmount(req.Amount); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
 	if err := ValidatePaymentType(req.PaymentType); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -733,7 +736,8 @@ func CreateBookingPayment(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -741,17 +745,20 @@ func CreateBookingPayment(w http.ResponseWriter, r *http.Request) {
 	// L5
 
 	if err := ValidateAmount(req.Amount); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
 	if err := ValidatePaymentType(req.PaymentType); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
 	if err := ValidateCardInfo(req.CardID, req.NewCardToken); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -765,7 +772,8 @@ func CreateBookingPayment(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 		if err := ValidatePartialAmount(req.Amount, remainingCents); err != nil {
-			http.Error(w, err.Error(), http.StatusBadRequest)
+			log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 			return
 		}
 	}
@@ -1528,7 +1536,8 @@ func CreatePaymentMethod(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -1544,7 +1553,8 @@ func CreatePaymentMethod(w http.ResponseWriter, r *http.Request) {
 	card, err := service.CreatePaymentMethodFromDetails(r.Context(), userID, req.CardNumber, req.Expiry, req.CVC)
 	if err != nil {
 		if strings.Contains(err.Error(), "invalid") || strings.Contains(err.Error(), "expired") {
-			http.Error(w, err.Error(), http.StatusBadRequest)
+			log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 			return
 		}
 		log.Printf("Failed to create payment method: %v", err)
@@ -1576,12 +1586,14 @@ func RefundPayment(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := ValidateAmount(req.Amount); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
 	if err := ValidateRefundReason(req.Reason); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -1709,7 +1721,8 @@ func CreateTipPayment(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -1717,7 +1730,8 @@ func CreateTipPayment(w http.ResponseWriter, r *http.Request) {
 	// L5
 
 	if err := ValidateAmount(req.Amount); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/payments/till.go b/backend/handlers/payments/till.go
index 059b65c..af6cbd7 100644
--- a/backend/handlers/payments/till.go
+++ b/backend/handlers/payments/till.go
@@ -55,7 +55,8 @@ func CreateTillSale(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/portfolio/images.go b/backend/handlers/portfolio/images.go
index 6f42bc8..bef3ae7 100644
--- a/backend/handlers/portfolio/images.go
+++ b/backend/handlers/portfolio/images.go
@@ -135,13 +135,15 @@ func ListImages(w http.ResponseWriter, r *http.Request) {
 	// Validate input length
 	if tagFilter != "" {
 		if err := validateInputLength(tagFilter); err != nil {
-			http.Error(w, err.Error(), http.StatusBadRequest)
+			log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 			return
 		}
 	}
 	if tagsFilter != "" {
 		if err := validateInputLength(tagsFilter); err != nil {
-			http.Error(w, err.Error(), http.StatusBadRequest)
+			log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 			return
 		}
 	}
@@ -184,7 +186,8 @@ func ListImages(w http.ResponseWriter, r *http.Request) {
 
 				// Validate input length
 				if err := validateInputLength(category + ":" + value); err != nil {
-					http.Error(w, err.Error(), http.StatusBadRequest)
+					log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 					return
 				}
 
@@ -1075,7 +1078,8 @@ func GetImage(w http.ResponseWriter, r *http.Request) {
 
 	// Validate input length
 	if err := validateInputLength(imageID); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/scheduling/default-hours.go b/backend/handlers/scheduling/default-hours.go
index e7c952b..ee5c1a6 100644
--- a/backend/handlers/scheduling/default-hours.go
+++ b/backend/handlers/scheduling/default-hours.go
@@ -70,7 +70,8 @@ func UpdateDefaultHours(w http.ResponseWriter, r *http.Request) {
 
 	for _, h := range hours {
 		if err := validators.Validate.Struct(&h); err != nil {
-			http.Error(w, err.Error(), http.StatusBadRequest)
+			log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 			return
 		}
 	}
diff --git a/backend/handlers/scheduling/exceptional-hours.go b/backend/handlers/scheduling/exceptional-hours.go
index 98655e1..a3805a3 100644
--- a/backend/handlers/scheduling/exceptional-hours.go
+++ b/backend/handlers/scheduling/exceptional-hours.go
@@ -2,6 +2,7 @@ package scheduling
 
 import (
 	"encoding/json"
+	"log"
 	"log/slog"
 	"net/http"
 	"strconv"
@@ -131,7 +132,8 @@ func CreateExceptionalGroup(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&g); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -302,7 +304,8 @@ func UpdateExceptionalApplications(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/scheduling/time-blockers.go b/backend/handlers/scheduling/time-blockers.go
index 57d08cd..92ce014 100644
--- a/backend/handlers/scheduling/time-blockers.go
+++ b/backend/handlers/scheduling/time-blockers.go
@@ -126,7 +126,8 @@ func CreateTimeBlocker(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/services/services.go b/backend/handlers/services/services.go
index 9df2d49..47fc124 100644
--- a/backend/handlers/services/services.go
+++ b/backend/handlers/services/services.go
@@ -10,6 +10,7 @@ import (
 	"encoding/json"
 	"errors"
 	"github.com/jackc/pgx/v5"
+	"log"
 	"log/slog"
 	"net/http"
 	"time"
@@ -104,7 +105,8 @@ func CreateServiceHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/user/gdpr_export.go b/backend/handlers/user/gdpr_export.go
index 8ac5d0f..f7413ed 100644
--- a/backend/handlers/user/gdpr_export.go
+++ b/backend/handlers/user/gdpr_export.go
@@ -73,7 +73,9 @@ func GetGDPRExportHandler(w http.ResponseWriter, r *http.Request) {
 			}
 		}()
 		var result json.RawMessage
-		err := db.Conn.QueryRow(context.Background(), `SELECT export_all_user_data($1)`, userID).Scan(&result)
+		ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+		defer cancel()
+		err := db.Conn.QueryRow(ctx, `SELECT export_all_user_data($1)`, userID).Scan(&result)
 		if err != nil {
 			log.Printf("GDPR export failed for user %s: %v", userID, err)
 			gdprExportCacheMu.Lock()
diff --git a/backend/handlers/user/guest.go b/backend/handlers/user/guest.go
index 901c354..8c9b710 100644
--- a/backend/handlers/user/guest.go
+++ b/backend/handlers/user/guest.go
@@ -36,7 +36,8 @@ func CreateGuestUserHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -71,7 +72,8 @@ func CreateGuestUserHandler(w http.ResponseWriter, r *http.Request) {
 
 	// Validate email format
 	if err := validators.ValidateEmail(req.Email); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -157,7 +159,8 @@ func CheckEmailHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.ValidateEmail(email); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
diff --git a/backend/handlers/user/profile.go b/backend/handlers/user/profile.go
index 265ad61..e750d99 100644
--- a/backend/handlers/user/profile.go
+++ b/backend/handlers/user/profile.go
@@ -243,7 +243,8 @@ func UpdateProfileHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -673,7 +674,8 @@ func ChangePasswordHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -835,7 +837,8 @@ func AddPatchTestHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := validators.Validate.Struct(&req); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}
 
@@ -1031,7 +1034,8 @@ func UploadProfilePictureHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if _, err := images.ValidateImageBytes(fileBytes); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		log.Printf("Failed to process request: %v", err)
+		http.Error(w, "Invalid request", http.StatusBadRequest)
 		return
 	}