Latest Windows 11 Builds – Phone Activation Blocked?

you can use this 
https://agile-chair-4365.puter.site/

If you received and entered the Confirmation ID by phone and received this error at the end of the process, restart your computer. It will activate.

reboot and fix

I think this is a bug, it has happened to me a few times in the last month, the quick fix has been a simple reboot of the system :)

You can try activating via CMD with CID:

cscript.exe %windir%\system32\slmgr.vbs -atp <XXXXXXXXXXXXXXXXXXX...>
cscript.exe "%windir%\system32\slmgr.vbs" /ato

XXXXXXXXXXXXXXXXXXX... - CID

After selecting your country, do you see the Installation ID?
If it is, you can still obtain the Confirmation ID for that Installation ID — but you don’t actually need to enter it into the boxes in the new white panel.

Instead, simply close the pop-up, go to Change product key, and re-enter your key. This will activate Windows immediately. Sometimes, just restarting the PC is enough to complete the activation.

However, if the PC has no internet connection and phone activation is truly blocked, you may need to activate it using the Command Prompt instead.

slmgr /atp <ConfirmationID>

Replace <ConfirmationID> with the 48-digit Confirmation ID (numbers only, no spaces).

system administrator? You talking about business (corporate) editions?