server 2022 suddenly shutdown

I have a Windows server 2022 standard that suddenly shutdown and I can't find the reason why. I have the two events that have numbers saying why, but I can't find a definition of what they mean.  What do the two following events say about why a server just shutdown.

Information
6/7/2024 11:07:19 AM
Microsoft-Windows-Kernel-Power
566
-268
The system session has transitioned from 181 to 183. Reason: 21

Information
6/7/2024 11:07:19 AM
User32
1074
None
The process C:\Windows\system32\winlogon.exe (MYSERVER) has initiated the power off of computer MYSERVER on behalf of user NT AUTHORITY\SYSTEM
for the following reason: No title for this reason could be found
Reason Code: 0x500ff
Shutdown Type: power off
Comment:

Thanks.