I need help as well! Thank you Alex
COMMUNAL SOURCE OF PROBLEM: Plugins.
COMMUNAL SOLUTION: Make them inactive one by one, and by trial and error it should resolve itself.
Here’s how I did it: Go into wp-content/plugins and create new folder called “disabled”. Drag plugin folders into the “disabled” folder one by one(thus changing the file structure), and refresh the login page each time. For me it was WordPress Tweaks, but it seems it was different for everyone. There are many threads out there like this one, please spread the word.
