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java.lang.RuntimeException: Failed to check session lock, aborting	at undefined.e.e(SourceFile:52)	at undefined.e.(SourceFile:38)	at undefined.ar.(SourceFile:18)	at undefined.adg.a(SourceFile:77)	at net.minecraft.client.Minecraft.a(SourceFile:1641)	at undefined.xz.e(SourceFile:161)	at undefined.xz.a(SourceFile:119)	at undefined.xe.a(xe.java:58)	at undefined.xe.h(xe.java:106)	at undefined.xe.g(xe.java:91)	at net.minecraft.client.Minecraft.k(SourceFile:1362)	at net.minecraft.client.Minecraft.x(SourceFile:705)	at net.minecraft.client.Minecraft.run(SourceFile:658)	at java.lang.Thread.run(Unknown Source)