iCloud photos has stopped responding

Good afternoon monrlloyd,

Welcome to the Apple Support Communities!

I understand the Photos app on www.iCloud.com has stopped responding. The first thing you can do is check the system status for "iCloud Web Apps."

System Status

If there is no issue, try signing out of iCloud, quitting the browser and restarting your computer to refresh it and re-establish a connection to the internet.

If the issue persists when you sign back into your account at www.iCloud.com take a look at the resource below. There is a link to Apple Support if you need more help.

Get help with iCloud Photos on your Windows PC

Take care.

Contact apple support see this link https://support.apple.com/en-in/HT201232

The application quits unexpectedly see this article https://support.apple.com/en-in/guide/disk-utility/repair-a-disk-dskutl1040/mac

The steps in this article are to be followed when required otherwise not see this article https://support.apple.com/en-za/HT205966

Don't ever use third party applications see this article https://support.apple.com/en-us/HT204968

It will corrupt the photo library .

Most probably its is the issue with disk errors , you can consult senior advisors and click on send to apple ( as shown in your screen shot ) .