Good Morning everyone,
I have managed Moodle and always update its version. Until then, I never had problems.
This problem has been fixed in the previous version of Moodle 3.6 because I had the same problem earlier this year.
I still tried to change the Moodle version to 3.6, 3.7 and 3.8, but it doesn't work. All versions have the same problem. When I try to duplicate the "Quiz", the page loads forever.
My Lamp versions have these features:
Apache 2.4.28 (Debian)
Debian 10 (Buster)
Thank you all for your attention