D80 EPM Phone Apps Working

I agree…if one wants to use Sangoma D-series phones in a local network, it shouldn’t be necessary to open a port of the local pbx (portforwarding router) to the www.
By the way, I just updated all modules on my freePBX 15 system. Why does the EPM (15.0.41.49) show no template for the D80?

If the solution would be to upgrade to freePBX 16…my second question is…how do I upgrade, when I receive errors?