Tinder Code 40303 states that you are banned from Tinder and don’t have access to log in to your account. Majorly, you won’t be able to see the error code as one pop-up message will display stating “something went wrong,” and then you be redirected to the login screen. The only option to troubleshoot the issue is to appeal your account. Remind that there are not many chances that you can get your account but still try if you think you haven’t done anything wrong. The only way left after getting Tinder code 40303 is to create a new account and using it properly.