Restore Drupal from Backup

How did you restore it, full account backup or just the drupal files? What are you seeing white pages or errors?
Is the database there? You can check it via your cPanel > phpMyAdmin.

If the database is there and the files are there, you might reset the user for that DB password or create a new user and add him to the DB and then edit your config file for the site itself.

 

You have a full database backup from 3 weeks ago you think is fine. Upload just that sql file if you can to the account (outside public_html) and restore it via command line instead. Not sure if that'll help or not but is surely the best way to restore a db even if it's a small one.

I'm not up on Drupal these days, but surely if once that database is put back properly you should be able to go into it (via phpMyAdmin) and find the modules table or whatever its called and disable some features if needed. If one of them is causing the problems that might help.

Sorry I can't suggest more without knowing more of course. You might want to try the Drupal forums.

GL!

 

Was the site using some sort of custom theme during the time the backup was taken, and is not now possibly? Grabbing at straws here trying to guess of course.

I do think your best bet is on the Drupal forums, but if you believe there may be an issue server side on this you might want to put in a ticket to cPanel support.