Thanks Andy at the time of reporting prior to Oct 2024 EOL for r77.20.87 it was reported so no reason for this not to be looked at. The watchtower works if I use the browser to get access to GUI. What has stopped working is the WatchTower app and pairing and in doing debug you can see the firewall goes out, but CP never responds back so to me it looks like it's being blocked by CP end. CP has also stated many others have had this issue and was resolved with a reboot. Unfortunately not for me.
I was also given a private build B163 upon request if there was a newer one outside of B160 released to address the zero day VPN. B163 fixes SFWD crashes believe specific to certs and added some features for radius ported from R81. However, don't believe this is a firmware issue so never updated and seeking if anyone else installed B163 those that are still on this device.
Any support is always appreciated still waiting for TAC/R&D to come out officially to state something. If it's been discontinued to use, am fine. I was simply using the app portion to see new devices connecting to my network.