1. Then you need to setup your own persona account on Facebook and use it to setup an app. It’s Facebook official policy. Business accounts can’t have apps. You can’t do anything about that.

2. >> Login/Connection Error: Your password was changed 19 days ago.

What kind of additional information do you need about that error? Please enter you new correct password, not the old one that you changed 19 days ago. That old password is no longer working.