iCloud Photos on Web Browser - Photos was unable to load your photos or videos

Hi

I am trying to view my photos in iCloud via the web browser.

I am logging in to www.icloud.com/photos and able to sign in... when I click on photos I get an error showing 'Cannot Load library Photos was unable to load your photos or videos'

When I view the iCloud usage I can see lots of space being used for photos and my phone is showing over 103,000 photos and iCloud photos backup is active.

So I don't understand why this error is showing when I am trying to view the photos via the broswer

I have updated my browsers, tried via several different browsers, tried in incognito mode, tried switching sync on/off on the phone etc.... but nothing seems to work

Any help would be greatly appreciated.

Screenshot is below