as I installed moodle 3.8.3+, and when I recently updated to the latest version 3.9 moodle -
changing the "default Home page for users" (DEFAULTHOMEPAGE) parameter to "personal account", the error "the site made redirects too many times" falls out.
Hard rebooting, clearing the cache, and deleting cookies doesn't help.
What to do? You have to leave only the "Site"... I thought it was a bug 3.8.3, but no....
Installed on a clean one, i.e. there were no transfers of the database and data folders, everything was filled in from scratch with regular site tools.
p.s. I used a translator from Russian.