Windows 11 - iCloud - Verification failed - Action cannot be completed.

Had this issue, go to installed apps, find icloud and choose advanced options, scroll to the bottom and reset app (including data). Then launch the app and login again.

Hi crkinard,

The following steps address what you're describing specifically, and should provide a solution:

"How to tell if your security software might be causing an issue

Security software created by companies other than Apple can prevent iCloud for Windows or iTunes from connecting to Apple servers or to devices. Sometimes, you might see a numeric error message when you sync, update, back up, or restore your device.

If your security software is causing an issue with iCloud for Windows

• You can't sign in with your Apple ID.
• You see "Verification Failed: An unknown error occurred" or "An error occurred during authentication. Please try again." 
• You see "Your setup couldn't start because your username or password is incorrect" or "Your setup couldn't be started because the iCloud server stopped responding."
• iCloud services won't update. "

You can find these steps along with other information that may be helpful, here: Resolve issues between iCloud for Windows or iTunes and third-party security software - Apple Support (English)

We also recommend restarting your device and keeping it updated as those steps assure you have cleared out any minor software issues and are running the most current version.

If you still have questions, reach out to Apple Support directly, as this may require closer guidance: Get Support

Cheers!