Hello there,
Are they any other log files like wsyncmgr.log for Wsus?
Please refer to the below steps to see whether this issue will be resolved or not:
Open the CMD as an administrator and print the following commands one by one: net stop bits
net stop wuauserv
Delete the software distribute folder
Then print the following commands on the CMD: net start bits
net start wuauserv
Scan for updates on the clients manually
Similar discussion here https://learn.microsoft.com/en-us/answers/questions/719889/wsus-server-is-not-getting-new-updates-for-windows
Hope this resolves your Query !!
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