Error on login as wp-admin

Was adding images to the media.
Clicked to go back to the dashboard in:
https://www.global-it-services.com/wp-admin/
and all I get is
Warning: Invalid argument supplied for foreach() in /home/mhd-01/www.global-it-services.com/htdocs/wp-admin/includes/plugin.php on line 1566
Non hai il permesso di accedere a questa pagina. (you don’t have access to this page)
Checked that there is disk space available, there is both for the pages and the database.
Tried to rename the plugins folder and all I get is
you don’t have access to this page
(translating from italian, could be slightly different in english)
I really don’t know what to do to identify the plugin that suddenly created the issue.

[redacted by moderator]

• This topic was modified 7 years, 1 month ago by Steven Stern (sterndata).

The page I need help with: [log in to see the link]