"Debugging and troubleshooting", "List of MyChat Client errors", "Error #0312".
 
Error

Error #0312: heavy load on the server, connection refused

 

Error description

When connecting to the server, it turned out that the server is under heavy load, which is why the connection was refused. The load can be because of old hardware or slow virtual machine, or huge instant load with mass user connections after the server restart or when restoring connection after enabling network interfaces.

 
Problem solution

Wait for several seconds, the connection will be restored automatically.

 

Also, the connection refuse can be caused by small parameter values — MaxNewConnectionsPerSecond from the file options.json located in the same folder with the server's core, mcserv.exe.