Error 500 (auth page only)

Hello,

Quite often, the page linked (custom login URL) isn’t viewable (error 500) whereas the website is OK in front end.
So, I guess the problem can come from AIOS… I’m using it on other websites which aren’t impacted while this one is.

Can you help me to solve that without uninstalling AIOS ?

WordPress : 6.2
PHP : 8.2
Theme : DIVI
Hosting : Ionos

Thank you.