Unable to add blocks in wordpress posts

Your editor is in code/text mode.

It’s possibly this is because you turned it off in your profile edit screen.

Its also possible it’s because you selected code editor in the options menu in the top right corner.

enter image description here

It’s also possible you have JS errors in your browser console that are preventing the block editor from loading.

Please do note that I installed the classics editor and then Uninstalled it. This problem has been happening ever since then. Could the uninstalled classics editor be the culprit somehow?

No, the classic editor would need to be installed and active to interfere with the block editor.

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