icloud goes back to sign in page after saying welcome

Hello goldie161,

Thanks for posting in Apple Support Communities. We understand that you're stuck in an Apple ID log in loop with iCloud on your Mac. We'd like to help!

We see that you posted from this support article: If you can't connect or sign in to iCloud - Apple Support

Where are you trying to sign in on your Mac? Are you able to log into the iCloud website successfully? Have you confirmed that there are no known outages in your region?

If you haven't already, try restarting your Mac. This is a simple step that can resolve unknown issues like this: Shut down or restart your Mac - Apple Support

We look forward to hearing back! Take care.

I have the exact same problem. I've tried my android phone using a few different browsers, and then the same results with my windows laptop.

Also verified cookies and Java are enabled, per the second hit when searching for a resolution.