[16:25:17 ERROR]: [VoxelSniper] Error executing brush
java.lang.NullPointerException
        at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:213) ~[spigot-1.8.8.jar:git-Spigot-db6de12-18fbb24]
        at com.voxelplugineering.voxelsniper.shape.ComplexMaterialShape.setMaterial(ComplexMaterialShape.java:155) ~[VoxelSniper-7.1.0-SNAPSHOT-all.jar:7.1.0-SNAPSHOT+unknown-b0.git-unknown]
        at com.voxelplugineering.voxelsniper.brush.effect.OldLinearBlendBrush.run(OldLinearBlendBrush.java:187) ~[VoxelSniper-7.1.0-SNAPSHOT-all.jar:7.1.0-SNAPSHOT+unknown-b0.git-unknown]
        at com.voxelplugineering.voxelsniper.brush.BrushChain.run(BrushChain.java:133) ~[VoxelSniper-7.1.0-SNAPSHOT-all.jar:7.1.0-SNAPSHOT+unknown-b0.git-unknown]
        at com.voxelplugineering.voxelsniper.event.handler.CommonEventHandler.onSnipe(CommonEventHandler.java:164) [VoxelSniper-7.1.0-SNAPSHOT-all.jar:7.1.0-SNAPSHOT+unknown-b0.git-unknown]
        at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_66]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_66]
        at com.voxelplugineering.voxelsniper.service.eventbus.AsyncEventBus$EventCallable.call(AsyncEventBus.java:325) [VoxelSniper-7.1.0-SNAPSHOT-all.jar:7.1.0-SNAPSHOT+unknown-b0.git-unknown]
        at com.voxelplugineering.voxelsniper.service.eventbus.AsyncEventBus$EventCallable.call(AsyncEventBus.java:310) [VoxelSniper-7.1.0-SNAPSHOT-all.jar:7.1.0-SNAPSHOT+unknown-b0.git-unknown]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_66]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_66]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_66]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_66]