"Cert is not authorized for appid 0, only $appId"

[Arr-n-D]

I've been developing a game server in Go with the Go GNS bindings, which only target the open source version

I've recently created an app, and then got the Steamworks.NET version for my Unity client.

When the client attempts to connect to the server, The server outputs the following errors when trying to accept the connection. I've tried adding k_ESteamNetworkingConfig_IP_AllowWithoutAuth = 1 on both server and client, but that does not seem to be sufficient.