T4 Coop Server "rejected a connection" in console

[broken.nin]

Almost everything is going well. The server is showing up on the list, but no one can connect. I'd expect a password entry prompt for the server as specified in the .cfg, but the console simply shows the following:

Client 0 connecting with [insert ping here] challenge ping from [insert ip address here]
Rejected a connection

Back on the game for both my friend and I (the host), we get a message saying "server is full." Any idea what needs to be fixed? Thank you so much in advance!

[broken.nin]

After a little bit of troubleshooting, I realized what's wrong. I misunderstood the flow of the program and needed to open the console ("~" on US QWERTY keyboards) and type:

password [insert password here]

But, with the password replacing the brackets and bracketed phrase. From there, I browsed the server list for my server and joined without issue.

[Xerxes]

Keep in mind that if you set a PW and join a different server it will still send the PW in plaintext to the other server.

[broken.nin]

Xerxes I'll keep it in mind! Thank you!