I was having problem to do a manual windows update for the following KB;
KB4525236 updates Windows 10 1607 to Build 14393.3326 – 12 Nov 2019 and showing an errors "is not supported"
And current version is running on windows server version 1607 (OS build
14393.3274) windows server 2016 64 bit.
For your information, it need to run manually for the monthly windows update instead using the WSUS solution.