Just a behavior that I ran into within cnMaestro is if you try to apply either the WPA2 Pre-Shared Key or the WPA2/WPA3 Pre-Shared within the WLAN properties will get the following error:
Not In Sync: Configuration failed: wlan1_security:specified parameter not in supported list of values
This will happen if you have an non WPA3 (Wifi 6) capable access point within the WLAN you are defining. In my lab environment I only have cnPilot e410 at this time. Through trial and error I was able to test this behavior when the error was cleared only when I did not select the WPA3 options did the e410 sync correctly.
Hope this post will save some future headaches when you are running into the same issue.