Try disabling IPV6 on your PC (see instructions in link below). I cant remember if this was the error message I was seeing, but I found that AOG cannot ingest NTRIP over an IPV6 connection.
ntrip-connection-fails-over-a-network-connection-with-ipv6-enabled
I opened a bug on here, but it got closed with no resolution (maybe we are supposed to raise on github instead?)