When i tried to send message in whatsapp with my existing template which i was using previously, it throws this error

Error Response: {"error":{"message":"(#135000) Generic user error","type":"OAuthException","code":135000,"error_data":{"messaging_product":"whatsapp","details":"Generic user error"},"fbtrace_id":"A1waaM6nHFNACvy0TmQySEo"}}

Please help me