Your version of windows 11 has reached the end of service. click to download a newer version of windows 11 to stay supported.

The best approach I have practiced, is to joins the Insider Programme (the recommended is Dev Channel, it is relatively more stable than the rest.), and then you will receive an update to the newest preview version of Windowes11 (mine is 23h2).
Pls note that preview version are usually unstable, so you need to unscbscribe the insider programme after the dev channel update(https://www.microsoft.com/en-us/windowsinsider/leave-program).
Then, not soon you will receive the newest stable update. This is how i managed to move my device from 21H2 to 23H2.

Using the Insider program in that way is not good advice.

They recommend not using test builds on your day to day system as a problem update may require a clean install.

The best approach I have practiced, is to joins the Insider Programme (the recommended is Dev Channel, it is relatively more stable than the rest.), and then you will receive an update to the newest preview version of Windowes11 (mine is 23h2).
Pls note that preview version are usually unstable, so you need to unscbscribe the insider programme after the dev channel update(https://www.microsoft.com/en-us/windowsinsider/leave-program ).
Then, not soon you will receive the newest stable update. This is how i managed to move my device from 21H2 to 23H2.

The exact problem you have just started for me this week as well. I have been trying all morning to fix it. Still nothing.

Mine is now resolved, I installed the "Windows 11 Installation Assistant" and then was able to use that to update to the newer version. It took a bit of time, but it's all good now using version 24H2 - ironically my computer is much faster now and had slowed down quite a bit ?

Use this link to download the "Windows 11 Installation Assistant" which will take your through the process. https://www.microsoft.com/en-us/software-download/windows11  Good Luck!

Microsoft release version updates once per year via windows update. When they are not installed or fail to install check update history) once the version is out of support update seem to stop.

Version 21H2 and 22H2 are out of support so if not updated that may be the reason. Or windows update has a problem which could relate to hardware and/or driver support.

Check to make sure the hardware bios and drivers are up to date. Check update history to see if version updates have failed to install in the past.

If it cannot be fixed by using the reinstall option in Settings > System > Recovery then go to Download Windows 11 and use the Windows 11 Installation Assistant.

Failing that download an ISO image file and use the in-place upgrade/repair option detailed for Windows 10 in the following link. Repair Install Windows 10 with an In-place Upgrade | Tutorials the process is the same for Windows 10 and 11 but for Windows 11 use the Download Windows 11