It shows you:
Clar client cache
->
Clear client cache
[2016-05-18 20:12:04] Exception in thread "main" [2016-05-18 20:12:04] java.lang.ExceptionInInitializerError [2016-05-18 20:12:04] at obfuscated.gm.<clinit>(SourceFile:166) [2016-05-18 20:12:04] at org.schema.game.common.Starter.cleanClientCacheWithoutBackup(SourceFile:344) [2016-05-18 20:12:04] at obfuscated.MM.callback(SourceFile:55) [2016-05-18 20:12:04] at org.schema.schine.network.client.GUICallbackController.execute(SourceFile:59) [2016-05-18 20:12:04] at obfuscated.aBU.a(SourceFile:179) [2016-05-18 20:12:04] at obfuscated.O.a(SourceFile:108) [2016-05-18 20:12:04] at obfuscated.Mu.a(SourceFile:63) [2016-05-18 20:12:04] at obfuscated.atU.b(SourceFile:603) [2016-05-18 20:12:04] at obfuscated.O.e(SourceFile:717) [2016-05-18 20:12:04] at org.schema.game.common.Starter.startMainMenu(SourceFile:1215) [2016-05-18 20:12:04] at org.schema.game.common.Starter.main(SourceFile:1021) [2016-05-18 20:12:04] Caused by: java.lang.NullPointerException [2016-05-18 20:12:04] at org.schema.game.client.view.cubes.shapes.BlockShapeAlgorithm.c(SourceFile:760) [2016-05-18 20:12:04] at org.schema.game.client.view.cubes.shapes.BlockShapeAlgorithm.e(SourceFile:825) [2016-05-18 20:12:04] at org.schema.game.client.view.cubes.shapes.BlockShapeAlgorithm.<init>(SourceFile:315) [2016-05-18 20:12:04] at obfuscated.lj.<init>(SourceFile:16) [2016-05-18 20:12:04] at obfuscated.ll.<init>(SourceFile:20) [2016-05-18 20:12:04] at org.schema.game.common.data.world.SegmentDataOld.<clinit>(SourceFile:84) [2016-05-18 20:12:04] ... 11 more