Thank you very much for caring. You are right, it looks like the two issues are related because they both involve admin panel. However, I have reopened the topic because I have installed version 4.2.1, which solves the other issue, and my problem is still there.
I hadn’t checked before, so I cannot be 100% sure, but editors can access my admin panel with Event Post 4.2.1 activated, so it seems that the other issue has indeed been solved.
Mine, however, has not.
Thank you very much for your attention