Can't access dashboard

I deactivated themes and plugins but nothing

Deactivated Themes?

There should always be a theme active twenty ten should have opened.

Tried that as well. Still nothing when it comes to accessing the dashboard.

Have you tried renaming .htaccess file that is hidden file.

Renamed it. Still nothing.

So right now, I have all plugins and themes (except twenty) deactivated. Also wp-include and wp-admin folders are from the backup. Same with the files from root folder.

Is kinda becoming frustrating.

ok let us what error you get
add this to wp-config.php: define('WP_DEBUG', true);. This will turn on error reporting and display, if your server supports it, and may reveal the issue.

It doesn’t return anything (or I don’t know where to look).

I deleted all the files on the server (except htaccess and wp-content) and uploaded them again. Still nothing.

I don’t think it’s from my hosting provider because I have another site (add-on domain) on the same server and that works.

And thanks govpatel for the help. I really appreciate your effort ??

Where are you trying to install wordpress is in root are sure you have it on right place.

My wordpress it’s installed correctly. It worked before I updated it (and then came back to the backup).