Users, plugins, and post: cannot delete

Hello people, I am writing because I have a problem. I explain briefly:
some days I can not delete users, articles, plugins and any changes that face from the back end of my wordpress is not carried out.

At the same time there has been a problem in the editor screen of the article, I can not see the categories to be assigned, but only the status of the item in question and the window where you can set the image out.

Now I ask, is because it is possible that the domain has expired, and having paid late, have not yet re-activated some functions in the DB?

I had a similar problem, but in that case it was a full DB and backend works wrong, but this is not the case.