Hello,
Even if I set the upgrade key in the "config.php" file as mentioned in the upgrade documentation, anonymous users can still see the upgrade page, moodle never ask to enter the upgrade key why?
I noticed this issue in moodle 2.7, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, and 3.6
Thanks for your help