Problem with ender client

[HyperBit]

After playing with the Ender client i get this error

java.lang.RuntimeException: java.net.SocketException: socket closed
at haven.Session$RWorker.run(Session.java:651)
Caused by: java.net.SocketException: socket closed
at java.net.DualStackPlainDatagramSocketImpl.socketReceiveOrPeekData(Native Method)
at java.net.DualStackPlainDatagramSocketImpl.receive0(Unknown Source)
at java.net.AbstractPlainDatagramSocketImpl.receive(Unknown Source)
at java.net.DatagramSocket.receive(Unknown Source)
at haven.Session$RWorker.run(Session.java:644)

[HyperBit]

After running I get this error

java.lang.RuntimeException: java.net.SocketException: socket closed
at haven.Session$RWorker.run(Session.java:651)
Caused by: java.net.SocketException: socket closed
at java.net.DualStackPlainDatagramSocketImpl.socketReceiveOrPeekData(Native Method)
at java.net.DualStackPlainDatagramSocketImpl.receive0(Unknown Source)
at java.net.AbstractPlainDatagramSocketImpl.receive(Unknown Source)
at java.net.DatagramSocket.receive(Unknown Source)
at haven.Session$RWorker.run(Session.java:644)

[MagicManICT]

Merged with post from How Do I? Please don't post the same issue in multiple places. Give those that can provide help time to do so.

You might read through the thread for Ender's client to see if your question is already answered as the problem may have come up before.