iCloud Refuses to work on Windows 11

Try temporarily turning off any VPN, Antivirus, or Firewall. Apple servers in particular do not play well with network altering processes running on your device. Those apps can also block ports used specifically for iCloud connections so the trouble only appears when accessing Apple servers.

If your device has network connectivity issues, check for VPN and other third-party security software - Apple Support

Sorry, I am not much help with the logs, but a Google search of each points more to something wrong with your individual setup, instead of a bug in the app. There are multiple references to files that have been moved, deleted, or lacking user permission for access that would be the cause.

• WARN EnumFilesAtPath File not found (2) on C:\ProgramData\Apple Inc\iCloud\Outlook

This warning means iCloud for Windows is looking for a specific Outlook support or add-in folder on your system that does not currently exist.

• WARN Services::ServiceSetEnabled Failed to set enabled state for service: Outlook32 (Service Unavailable)

This log message indicates that a script, deployment tool, or configuration manager failed to toggle the enabled/active state for the 32-bit Outlook component (Outlook32) because the target service endpoint or management provider returned a Service Unavailable status. 

• ERROR Services::ServiceSaveSettings Failed to save settings for service: iCloud Photos; error: O sistema n o pode encontrar o arquivo especificado. (Translated: The system cannot find the specified file.)

This error occurs when the iCloud for Windows app tries to update configuration or sync files, but the underlying sync folder or registry reference (often inside the Windows Pictures directory) has been moved, deleted, or lost permissions

There are a couple of things you can do.

• Send Feedback to Apple. Under Feedback Type, choose iCloud for Windows and then in the Comments describe the issue. Note that feedback is used for bug reporting and is typically a one way communication where you would not get a response back, but issues reported are used for improvements in future versions.

Feedback - iCloud - Apple

• Contact Apple directly.

Contact Apple Support - Apple Support

An issue/bug with the app would be affecting all users, not just you, so Apple Support would likely be well aware of this problem and may have more information for you. The app was last updated on 5/27, so make sure you are using that version from the Microsoft Store as that would contain the latest patches. I assume you have already tried turning off all of the recommended programs that have been seen to interrupt iCloud services.