Serverproblem: The sent UUID could not be verified. [Code:603]

Hallo zusammen!

Heute hat einer unserer Spieler, nachdem er einige Internetprobleme hatte ein Problem bei der Anmeldung am Server. Der Server spuckt dabei jedes Mal folgende Fehlermeldung aus:

de.jiw.apigility.exceptions.ApigilityException: The sent UUID could not be verified. [Code:603]
WARNING: Unable to authenticate player: SirKissy

Habt ihr eine Idee?

*************** NEW THREAD LOCAL ALLOCATION ***************
at java.lang.Thread.run(Thread.java:745)
at E.e.run(SourceFile:178)
at de.jiw.apigility.Apigility.getObjectData(Apigility.java:70)
at de.jiw.apigility.Apigility.getObjectData(Apigility.java:79)
at de.jiw.apigility.Apigility.processMainData(Apigility.java:88)
de.jiw.apigility.exceptions.ApigilityException: The sent UUID could not be verified. [Code:603]
WARNING: Unable to authenticate player: SirKissy
30.06.2016 21:14 E.d
at java.lang.Thread.run(Thread.java:745)
at E.e.run(SourceFile:178)
at de.jiw.apigility.Apigility.getObjectData(Apigility.java:70)
at de.jiw.apigility.Apigility.getObjectData(Apigility.java:79)
at de.jiw.apigility.Apigility.processMainData(Apigility.java:88)
de.jiw.apigility.exceptions.ApigilityException: The sent UUID could not be verified. [Code:603]
WARNING: Unable to authenticate player: SirKissy
30.06.2016 21:14 E.d
at java.lang.Thread.run(Thread.java:745)
at E.e.run(SourceFile:178)
at de.jiw.apigility.Apigility.getObjectData(Apigility.java:70)
at de.jiw.apigility.Apigility.getObjectData(Apigility.java:79)
at de.jiw.apigility.Apigility.processMainData(Apigility.java:88)
de.jiw.apigility.exceptions.ApigilityException: The sent UUID could not be verified. [Code:603]
WARNING: Unable to authenticate player: SirKissy
30.06.2016 21:14 E.d
at java.lang.Thread.run(Thread.java:745)
at E.e.run(SourceFile:178)
at de.jiw.apigility.Apigility.getObjectData(Apigility.java:70)
at de.jiw.apigility.Apigility.getObjectData(Apigility.java:79)
at de.jiw.apigility.Apigility.processMainData(Apigility.java:88)
de.jiw.apigility.exceptions.ApigilityException: The sent UUID could not be verified. [Code:603]
WARNING: Unable to authenticate player: SirKissy
30.06.2016 21:14 E.d
at java.lang.Thread.run(Thread.java:745)
at E.e.run(SourceFile:178)
at de.jiw.apigility.Apigility.getObjectData(Apigility.java:70)
at de.jiw.apigility.Apigility.getObjectData(Apigility.java:79)
at de.jiw.apigility.Apigility.processMainData(Apigility.java:88)
de.jiw.apigility.exceptions.ApigilityException: The sent UUID could not be verified. [Code:603]
WARNING: Unable to authenticate player: SirKissy
30.06.2016 21:14 E.d
SERVER START VERIFICATION OF CLIENT SirKissy
INFO: Client Connected ID: 1 IP: 134.255.252.158/134.255.252.158:4270
30.06.2016 21:14 E.d
register endpoint: de.jiw.network.kernel.tcp.TcpEndpoint@1a8a091b 1
register endpoint: de.jiw.network.kernel.tcp.TcpEndpoint@1f355de6 1
register endpoint: de.jiw.network.kernel.udp.UdpEndpoint@6fac6594 1
register endpoint: de.jiw.network.kernel.tcp.TcpEndpoint@8ff2f70 1
register endpoint: de.jiw.network.kernel.udp.UdpEndpoint@75c7bea6 1
register endpoint: de.jiw.network.kernel.udp.UdpEndpoint@4e8b7377 1
register endpoint: de.jiw.network.kernel.tcp.TcpEndpoint@135a65c3 1
Endpoints length: 7
registerClientChannel isComplete
dispatch: ClientRegisterChannelMessage UDP Port:4271
dispatch: ClientRegisterChannelMessage UDP Port:4272
dispatch: ClientRegisterChannelMessage UDP Port:4270
SET HOSTED CONNECTION FOR CHANNEL: 6 de.jiw.network.base.HostedConnection@2b202409
dispatch: ClientRegisterChannelMessage TCP Port:4273
SET HOSTED CONNECTION FOR CHANNEL: 5 de.jiw.network.base.HostedConnection@2b202409
dispatch: ClientRegisterChannelMessage TCP Port:4272
SET HOSTED CONNECTION FOR CHANNEL: 3 de.jiw.network.base.HostedConnection@2b202409
dispatch: ClientRegisterChannelMessage TCP Port:4271
INFO: ConnectionPending: 1
30.06.2016 21:14 E.d
dispatch: ClientRegisterMessage

INFO: Delete Client ID: 1
30.06.2016 21:12 E.d
Client: 1 removed