I have a problem with Joomla! and I don't know how to solve it.
I have a lot of articles, about 1500. When I try to open multiple articles in order to edit them, I receive one of these errors on random articles:
Error You are not permitted to use that link to directly access that page (article_id).
If I close the tab and reopen the article it works fine.
It's not about logout and log back in. In order to replicate the problem, try to open multiple articles one after the other (CTRL + Click). Not all articles, but some of the will throw this error.
I don't know what might be the problem and it gets annoying.