Can not make new post or a new page, nor can I save drafts

I have a problem, that I can not publish or save drafts when making a new page/post. When I click new post, for example, I can see this http://ift.tt/1zKmdoJ It should automatically say status: draft, am I right? Right now, it just shows empty status. When I click save draft or publish, then I get redirected to posts page. I have been searching, but haven't found any solutions. I don't get any errors either when I press save draft, it just won't save them and redirects. I went to php.ini to see, if it is a memory problem, but there was 512M. So that should not be the problem. My database is only 31.3MB. I renamed plugins folder, but that did not work either. What should I try more?