java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.helion3.keys.Configuration.(Configuration.java:61)
at com.helion3.keys.Keys.onServerStart(Keys.java:82)
at org.spongepowered.common.event.listener.GameStartedServerEventListener_Keys_onServerStart15.handle(Unknown Source)
at org.spongepowered.common.event.RegisteredListener.handle(RegisteredListener.java:95)
at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:301)
at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:330)
at org.spongepowered.mod.SpongeMod.onStateEvent(SpongeMod.java:229)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:243)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at net.minecraftforge.fml.common.LoadController.redirect$onPost$zzb000(LoadController.java:52)
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:145)
at net.minecraftforge.fml.common.Loader.serverStarted(Loader.java:858)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:433)
at java.lang.Thread.run(Thread.java:745)

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