исправил http

src/components/PriceLisForm/PriceLisForm.tsx

@@ -62,7 +62,7 @@ const PriceLisForm: React.FC<Props> = ({ open, onClose }) => {
 
   const sendToBackend = async (data: FormData): Promise<boolean> => {
     try{
-      const response = await client.post<{success: boolean}>("/api/email", {
+      const response = await client.post<{success: boolean}>("/email", {
       ...data,
     })