Same Issue here. I connected with a potable router as a repeter or with LAN cable. I get IPs but no internet with connected devices then.

The Beryl GL-MT1300 seems to have internet conneczion because he updated to the newest firmware from 3.202 to 3.203?!?

VPN can‘t be enabled so I‘m not shure whats the connection state of The Beryl MT 1300 device?!?

Any Idea how to solve this issue?