I’m having a similar problem on a RPi 2 with a fresh install of Max2Play. The interconnection was working fine with the ethernet cable plugged in, but I get a „No internet connection“ message when I use WIFI only.
I have unchecked WPS and „use as accesspoint“ and rebooted, to no avail.
What I find odd is that I can still access Max2Play locally from my laptop.
Thanks in advance for your help.