I was trying to install a plugin in a 3.1 Moodle deployment (https://moodle.org/plugins/tinymce_managefiles) and I got the message that a higher version is already installed (see screenshot below). I decided that I don't want to install it in this case so I just closed the tab. However, now every time I log in to Moodle, I'm redirected to this page, even after clearing the cache. I can still access other pages as long as I know the URL.
I eventually clicked "Upgrade Moodle database now" but it failed, and it returned me to this page. Is there a way to cancel this installation?