Board Thread:Support Requests - Getting Technical/@comment-30252184-20181022093522/@comment-168424-20181108183337

FYI, the error message appears to be in Finnish according to Google translate's language detector and means roughly: "error in storing information on the server".

Most likely it is a transient DB lock which should fix itself most of the time like those above have said. Make sure to copy the stuff in your editor (which may not copy all of it if it's the Visual Editor, but that's the best you can do), reload the page, paste it back and try again.