Got the same thing on one of my account. Apparently, you can still logged in and check the notifications and tweets but wouldn't allow you to do any actions, unlike before that you can't access your account when you got suspended. You can file an appeal there, do any actions and once it said you are suspended, click the link to file an appeal. You also need to response to their email after filing on their app. Just wait and hope they will unsuspend it.