java.lang.IllegalArgumentException: Invalid UUID string: *someRegex*

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java.lang.IllegalArgumentException: Invalid UUID string: *someRegex*
at java.util.UUID.fromString(UUID.java:194)
at me.blackvein.quests.Quests.checkQuester(Quests.java:4767)
at me.blackvein.quests.PlayerListener.onPlayerMove(PlayerListener.java:859)
at sun.reflect.GeneratedMethodAccessor57.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487)
at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:255)
at net.minecraft.server.v1_8_R1.PacketPlayInFlying.a(SourceFile:126)
at net.minecraft.server.v1_8_R1.PacketPlayInPosition.a(SourceFile:57)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:683)
at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316)
at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:623)
at java.lang.Thread.run(Thread.java:745)

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