[KryoNet] What works in earlier versions doesnt in 2.20

Was wondering why a piece of code worked in KryoNet 2.12 but not 2.18 and 2.20

I put the problem in the KryoNet issues section
but i looked through some of the other issues and none of them have been answered so The issues board may not be monitored anymore

So i thought i would try my luck here
https://code.google.com/p/kryonet/issues/detail?id=36

Thanks in advance