Can't join a server?

[Ev Dowg]

So my buddy tries to connect to my server and when it's challenging to connect it gets instantly closed out and it says that the server can't verify his BLID or some stuff. The problem can't be my server because I've had other people connect successfully. If that doesn't make sense then idk what to say.

Any advice?

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[Altiris]

This happens to me when I try and connect to my dedicated server, it worked once. I have heard this is a glitch with the master server. Try re-entering your key, going in offline mode, etc. Make sure your ports have been forwarded and all that (Once my TCP port for Blockland got deleted somehow, so make sure yours is still there)

[ScratchTehEPICSpaceDude]

Delete key.dat and restart your computer.