error 500 after changing ssl certificates

Hello everyone!
I recently changed the ssl certificates in my system. After that, I get a 500 error when I go to the course page. (https://domain/courses/course-name/about).
If the user is already registered for the course, then he can easily perform actions in it.

The SSL certificate was installed correctly, the browser displays the correct end date.

Maybe I forgot to change something in the config?
I replaced the ssl files in: apache2/conf/ and apps/edx/conf/certs/