After restoring a backup

After restoring a backup The main site is not working

This page isn’t working

*****.com is currently unable to handle this request.

HTTP ERROR 500

The strange thing is that the subdomain you signed with is working

I ran the site by giving permission to the public_html folder 755, but the strange thing is that all the files returned without database
is there a solution ؟

I can’t find the database in phpmyadmin

can you please extract that backup file and see if db file is there in the backup zip?