Why does my edit screen suddenly have such a buggy interface?

Next time it goes like this, open up Inspect Element and check the console for errors. I’m assuming it’s missing the stylesheet, but as a debug step look for the actual error first.

Then the old disable all plugins and see if you can replicate the issue.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)