I'm trying to edit a draft but whenever I click on "save draft", the changes I made to the post aren't saved and it doesn't let me publish it either. If I click on Publish, nothing happens. If I write a new post though, it works ok. It edits the changes and I can publish it, it's only trying to make any changes to old drafts that doesn't work.
I have no idea why the editor isn't working today. It was working fine yesterday but when I logged in this morning the problems started. I didn't install any new plugins, nor made any changes to the theme or installation files. It just stopped working all of a sudden.
Does anyone have any idea on how I can fix it?