Activate using the automated phone service, it ight think your key is being used twice or something. This is nothing new and has happened on Windows since XP.
Microsoft could not get it work their end, they said your key is legit but not working for some reason, been passed on to second level after they transfered me to the wrong place, still waiting for 40 miuntes plus now.
We had to block 23H2 from installing it was causing the volume licence to deactivate once updated to 23H2.
Toggle on Get the latest updates as soon as they’re available. If this is toggled off, you may get an error when you try to download and install the update.
Nothing on the internet is documented I can find, surely we cannot be only ones having this issue.
A new KB5031455 has been added to Windows Update
On mine that is the Cumulative update preview for Win11 version 22H2, is it worth installing or wait?