Looking for error on website

I am using PHP login for cslainfo.org/login.php and apparently the old web developer wrote some sort of custom member management. The license for it expired apparently but now the login is locked out. Any ideas? Thanks for the help in advance!

How do you know the license expired?
If it is something ‘custom’ then it wouldn’t be licensed, would it?

If you have access to the hosting server you can get to the database and the source PHP files.

Please provide a little more detail.