iCloud Drive Access Not Working - Browser or iCloud for Windows

I had the same issue! After months working with Apple Support, I stumbled upon the solution:

If yours was like mine, you notice that iCloud Drive page would load for a second and you would see some favorites in the left sidebar with a spinner below. Then after a second the error dialog would come up saying "Drive has stopped responding. An error has prevented this application from working properly. Help Apple improve its products by sending us diagnostic and usage information about Drive." with a details disclosure (which is where you got those logs which are similar to mine):

What I realized is that that spinner below the list of Favorites was the key. I went to my iOS device and unfavorited folders until I had less than 10 favorites. Once I did that, the error dialog no longer appears when going to iCloud Drive in a browser window.

The reason is that there must be a bug in iCloud.com/iclouddrive that has issues when loading more than 10 Favorites which is why it appears on all browsers (since it's a site issue not a browser or account issue) and why it doesn't appear in any browser on a tablet (since the tablet view doesn't show the sidebar where Favorites are).

I was able to reproduce the issue in multiple accounts. As soon as the 11th favorite is added, the error appears on the website. When the number of favorites goes back down to 10, the error goes away.

I almost lost all my data due to engineering wanting to reset my account to solve this issue, but thankfully I figured out the Favorites link and hopefully this will help others workaround this issue until Apple issues a code fix.

Hello SynnX,

Sometimes, situations like these can be related to security software on your PC. So what we'd recommend is to try the troubleshooting steps that are listed at Resolve issues between iCloud for Windows or iTunes and third-party security software - Apple Support and see if that can help correct this connection.

Cheers!

@SynnX

Hey there, I have the same issue (All iCloud.com applications crash when us… - Apple Community)

Do you have end2end encryption (advanced data protection) enabled too? Because that caused the issue in my case. Disabling advanced data protection fixes the web apps, but is obviously a bad idea if you value privacy.

It's a joke that this bug is in production for a whole week already and no fix in sight.

yes, same problem for me, too, and it was quite annoying...to say the least.

Deleting the 'Favorites' on my IOS device (same Apple ID login, of course) provide interesting. I wondered why 'Downloads' was on my Favorites grouping in the Files App on my iPad TWICE. Sometimes files would download to one folder, sometimes the other.

Anyhow, to fix this iCloud crash, I removed both Downloads folders from the Favorites category, and then refreshed the Safari browser on my Mac and it worked - iCloud files app opened properly.

Interestingly, a few minutes later a Downloads folder popped up by itself in the Favorites folder on my iPad, the disappeared again after maybe 5mins. Strange.

Hi SynnX,

Thanks for the update. We suggest that you contact Apple Support so that they can investigate this with you further. They can be reached here: Get Support

Best regards.

Yes, I was thrilled when I discovered this and I was able to reproduce in other accounts so I knew it wasn’t an account issue! Glad this fixed it for you!

THANK YOU! This was exactly the problem I have been having for months. And exactly the reason and 'fix' to work around it. Was driving me crazy!