First of all a new release of MediaMonkey 5 is available: https://www.mediamonkey.com/support/knowledge-base/mediamonkey-general/download-mediamonkey/ So I'd start with updating.

Figure 9: The parent option is disabled, thus the configuration is disabled.

Are you trying to Sync with the Service or with MediaMonkey itself running? Does UPnP access to the MediaMonkey server work in MMA? Please see: https://www.mediamonkey.com/support/knowledge-base/mma-device-sync/wi-fi-sync-doesnt-work-at-all/

I assume you're starting wi-fi Sync from MMA, as this can't be done from MMW.

Downloaded and installed MM5 and MMA two weeks ago but, so far, have been unable to perform a Wi_Fi sync. Started sync from my Android phone, it "spins" for a bit and then says Connection failed. I hunted thru various possible causes and solutions but have had no luck. While I know that a new version has been released during my struggle, I haven't bothered to download it because I feel that my problem is most likely NOT with the app but with my settings. I have a 26 page .pdf file of all the screen shots but can see no way to include it in or attach it to this post, so here is a link:
https://www.mediafire.com/file/byho7yu040x53p4/MM.pdf/file

Any ideas would be appreciated as I am a newbie (obviously) to Sync'ing.