Abstract list page not found

Hi, I am using Indico version 3.3.6 on an AlmaLinux 9.6 (Sage Margay). Everything works very well but from time to time the abstract list page (domain.example/event/{id}/manage/abstracts/list/) responded with “Not found” error. It is usually fixed by clearing the browser cache and site data but recently the contributions list page also started to show that error and clearing the browser cache couldn’t fix it. Any help will be greatly appreciated.

Do you have some (broken) cache in front of your Indico server? That error sounds REALLY strange!

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Thank you @ThiefMaster the issue was with mod_security which was restricting the response body size. Increasing the response body size by setting SecResponseBodyLimit solved the issue.