When editing the page normally it will not make any actual changes. Page appears just as it was before the editing and no errors will be displayed. The child pages etc. are all fine and no such issues.
I believe this is to do with the subscribers/watchers. When ticking the box "Minor Change" (no notifications will be sent) it edits the page just fine. Also when navigating to tools-> "manage watchers" it displays an error: "Failed to retrieve watchers".
Any suggestions? 