diff --git a/client/src/pages/me/ui/sections/AuthMethodsSection.tsx b/client/src/pages/me/ui/sections/AuthMethodsSection.tsx
index 8df4011..ca090cd 100644
--- a/client/src/pages/me/ui/sections/AuthMethodsSection.tsx
+++ b/client/src/pages/me/ui/sections/AuthMethodsSection.tsx
@@ -19,6 +19,7 @@ import {
   unlinkOAuthFx,
   type AuthMethod,
 } from '@/shared/model/auth'
+import { getErrorMessage } from '@/shared/lib/get-error-message'
 
 const METHOD_LABELS: Record<string, string> = { password: 'Пароль', vk: 'ВКонтакте', yandex: 'Яндекс' }
 
@@ -95,7 +96,7 @@ export function AuthMethodsSection() {
       return url
     },
     onSuccess: (url) => setVerificationUrl(url),
-    onError: (err) => setEmailChangeError(err?.message || 'Не удалось сменить email'),
+    onError: (err) => setEmailChangeError(getErrorMessage(err, 'Не удалось сменить email')),
   })
 
   if (!user) return null
diff --git a/client/src/shared/lib/get-error-message.ts b/client/src/shared/lib/get-error-message.ts
index a9e2f5c..11f3176 100644
--- a/client/src/shared/lib/get-error-message.ts
+++ b/client/src/shared/lib/get-error-message.ts
@@ -1,4 +1,8 @@
 export function getErrorMessage(error: unknown, fallback = 'Произошла ошибка'): string {
+  if (error && typeof error === 'object' && 'response' in error) {
+    const axiosErr = error as { response?: { data?: { error?: string } } }
+    if (axiosErr.response?.data?.error) return axiosErr.response.data.error
+  }
   if (error instanceof Error && error.message) return error.message
   return fallback
 }
diff --git a/server/prisma/prisma/dev.db b/server/prisma/prisma/dev.db
index 873e50e..fcc9ce1 100644
Binary files a/server/prisma/prisma/dev.db and b/server/prisma/prisma/dev.db differ
diff --git a/server/src/routes/user-payments.js b/server/src/routes/user-payments.js
index 9d89bc4..643d661 100644
--- a/server/src/routes/user-payments.js
+++ b/server/src/routes/user-payments.js
@@ -49,7 +49,8 @@ export async function registerUserPaymentRoutes(fastify) {
     }
 
     const idempotencyKey = `${id}-${Date.now()}`
-    const returnUrl = `${process.env.CLIENT_PUBLIC_URL || 'http://127.0.0.1:5173'}/me/orders/${id}?paid=1`
+    const clientUrl = (process.env.CLIENT_PUBLIC_URL || 'http://127.0.0.1:5173').replace(/\/$/, '')
+    const returnUrl = `${clientUrl}/me/orders/${id}?paid=1`
     const clientIp = request.ip
 
     const amount = {