triplea.engine.version.bin:1.9
Loading map: world_war_ii_revised, from: C:\Users\Merde\triplea\downloadedMaps\world_war_ii_revised-master.zip
Loading resources from the following paths: [C:\Users\Merde\triplea\downloadedMaps\world_war_ii_revised-master.zip, C:\Program Files\TripleA\assets]
Loading map: world_war_ii_revised, from: C:\Users\Merde\triplea\downloadedMaps\world_war_ii_revised-master.zip
Loading resources from the following paths: [C:\Users\Merde\triplea\downloadedMaps\world_war_ii_revised-master.zip, C:\Program Files\TripleA\assets]
java.lang.ArrayIndexOutOfBoundsException: 1
at games.strategy.engine.message.RemoteMethodCall.classesToString(RemoteMethodCall.java:128)
at games.strategy.engine.message.RemoteMethodCall.resolve(RemoteMethodCall.java:180)
at games.strategy.engine.message.unifiedmessenger.EndPoint.invokeSingle(EndPoint.java:153)
at games.strategy.engine.message.unifiedmessenger.EndPoint.invokeMultiple(EndPoint.java:146)
at games.strategy.engine.message.unifiedmessenger.EndPoint.invokeLocal(EndPoint.java:132)
at games.strategy.engine.message.unifiedmessenger.UnifiedMessenger.lambda$messageReceived$2(UnifiedMessenger.java:299)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

@AdamF agreed