/wp-admin/ works but website doesn’t load

The solution that worked for me was to update WordPress to the latest version.

I tried deleting the theme and to run the website, it didn’t work. It’s very awkward how the website crashed down and I was surprised that updating WordPress actually solved the problem.

Thanks, to everyone who tried to help!

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)