Blank page after restoring my website from backup

Hi, I backed up my osclass script and restored that same hour but I got a blank page whenever I try to access the website. Nothing has changed apart from the fact that I moved it from add-on domain to primary domain. Same url, small hosting. What can I do to display my website contents?

I need urgent help

If you need help show some logs, site url etc. no one can help you without these.

I’ve inserted php debug code in my config.php file. How do I go about checking the logs?

look at inside oc-content/ folder, there is saving error log file.
Check your database path if you changed hosting etc. Probably your sql path changed. You need to update it into config php.