iCloud Strange Log-out occurance

Hello,

Since yesterday I've been having trouble uploading things to my iCloud, yet thinking my WiFi was acting up, I did not think much off it.

But, having the same trouble today, I checked my System Preferences and noticed that for some reason I'd been logged out of my iCloud and needed to verify my password.

Naturally, I did so—however, every time I hit enter, the password gets accepted and then instantaneously logs me out again.

I tried signing out and signing in again; once more, my login credentials get accepted, but instantly log me out in seconds.

Anyone know how to fix this, as I use my iCloud constantly to ferry files between my iMac and my iPad, and this is not a happy situation.

As extra notes, I do not have any 2-factor identification enabled, I signed out and restarted my iMac before signing in again, and thus far have no troubles accessing the iCloud drive on my iPad.

Thanks so much for any assistance,

Kind regards,

Kimberly J.

[Edited by Moderator]