When generating a new world on a server the following error occurred.

[13:14:49] [Server thread/ERROR]: Encountered an unexpected exception java.lang.NullPointerException: null at com.ferreusveritas.dynamictrees.compat.CommonProxyCompat.registerBlocks(CommonProxyCompat.java:21) ~[CommonProxyCompat.class:?] at com.ferreusveritas.dynamictrees.ModBlocks.registerBlocks(ModBlocks.java:66) ~[ModBlocks.class:?] at com.ferreusveritas.dynamictrees.DynamicTrees$RegistrationHandler.registerBlocks(DynamicTrees.java:106) ~[DynamicTrees$RegistrationHandler.class:?] at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_109_RegistrationHandler_registerBlocks_Register.invoke(.dynamic) ~[?:?] at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) ~[ASMEventHandler.class:?] at net.minecraftforge.fml.common.eventhandler.EventBus$1.invoke(EventBus.java:143) ~[EventBus$1.class:?] at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:179) ~[EventBus.class:?] at net.minecraftforge.registries.GameData.fireRegistryEvents(GameData.java:734) ~[GameData.class:?] at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:603) ~[Loader.class:?] at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:98) ~[FMLServerHandler.class:?] at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:331) ~[FMLCommonHandler.class:?] at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:125) ~[nz.class:?] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484) [MinecraftServer.class:?] at java.lang.Thread.run(Unknown Source) [?:1.8.0_151]

Caused by calling Minecraft.isFancyGraphicsEnabled() serverside. This was caused by recently adding code to fix fast or fancy graphics for Dynamic Leaves blocks.