00:00 DEBUG: [kryonet] Accepting connections on port: 54555/TCP
00:00 DEBUG: [kryonet] Accepting connections on port: 54777/UDP
00:00  INFO: [kryonet] Server opened.
00:02 DEBUG: [kryonet] Port 54555/TCP connected to: /127.0.0.1:58661
00:02 DEBUG: [kryonet] Port 54777/UDP connected to: /127.0.0.1:65439
00:02  INFO: [kryonet] Connection 1 connected: /127.0.0.1
00:02 ERROR: [kryonet] Error reading TCP from connection: Connection 1
com.esotericsoftware.kryo.SerializationException: Unable to deserialize object of type: com.esotericsoftware.kryonet.Ball
	at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:564)
	at com.esotericsoftware.kryonet.TcpConnection.readObject(TcpConnection.java:139)
	at com.esotericsoftware.kryonet.Server.update(Server.java:185)
	at com.esotericsoftware.kryonet.Server.run(Server.java:324)
	at java.lang.Thread.run(Unknown Source)
Caused by: com.esotericsoftware.kryo.SerializationException: Class cannot be created (missing no-arg constructor): com.esotericsoftware.kryonet.Ball
	at com.esotericsoftware.kryo.Kryo.newInstance(Kryo.java:678)
	at com.esotericsoftware.kryo.Serializer.newInstance(Serializer.java:75)
	at com.esotericsoftware.kryo.serialize.FieldSerializer.readObjectData(FieldSerializer.java:199)
	at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:559)
	... 4 more
Caused by: java.lang.InstantiationException: com.esotericsoftware.kryonet.Ball
	at java.lang.Class.newInstance0(Unknown Source)
	at java.lang.Class.newInstance(Unknown Source)
	at com.esotericsoftware.kryo.Kryo.newInstance(Kryo.java:669)
	... 7 more
00:02  INFO: [kryonet] Connection 1 disconnected.