while updating a theme through defender my site broke down and can't access it

I installed defender on http://www.dj-pedia.com which is the primary domain on my shared hosting which also has 24 other installs of wordpress in subfolders.

defender suggested to update the theme, but for some reason it got stuck

when trying to access the site I see the following url:
http://dj-pedia.com/wp-admin/install.php

It says:
The dj-pedia.com page isn’t working

dj-pedia.com redirected you too many times.
Try clearing your cookies.
ERR_TOO_MANY_REDIRECTS

I can only access the site files through Godaddy, but impossible to login or to see the site. Help is appreciated :slight_smile: