‘Screen Options’ is missing. Where should I start troubleshooting?

See if there are errors in the developer console (F12 on most browsers)

If not, disable all plugins. If screen options return, enable the plugins one-by-one to see the offender.

If that doesn’t help, switch to the default theme to see if that’s the issue.

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