Could not resolve remote name error

[Alex Grigoriadis]

Got this error after connecting to another client on the same network. However, one client was able to see the other client's lobby and connect to it, only after the game started it dropped the connection.

[ERROR] Ln: 21 [MatchmakingService] Error while listening to server message : An internal WebSocket error occurred. Please see the innerException, if present, for more details. 
[ERROR] Ln: 21 [MatchmakingService] Error while listening to server message - InnerException : A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
[ERROR] Ln: 21 [MatchmakingService] inner exception : A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
[ERROR] Ln: 21 [MatchmakingService] Error when connecting to server : Unable to connect to the remote server
[ERROR] Ln: 21 [MatchmakingService] Error when connecting to server - InnerException : The remote name could not be resolved: 'tf-matchmaking-server.herokuapp.com'

Further testing is probably needed, it might be on my end

[Francis Cornaire]

Just tried and everything run as normal.
It might be the network like you said.
Feel free to add more if you have/find a reprodructible pattern