Form submission issue in wordpress admin (custom plugin) using $_GET for searching & filtering

The problem was actually being caused by wordpress.com . Looks like they made an update on their platform which made the search function stop working properly, as the issue was also happening on the default Blog and Page listing section in the admin even when plugins had been deactivated.

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