Error when trying to Full Render Twilight Forest

[Valentinez]

Doesn't render properly, when ran from console, I get this right after typing it:

08.08 23:30:53 [Server] Server thread/INFO Full render starting on world 'DIM7'...
08.08 23:30:53 [Server] Dynmap Render Thread/FATAL [Dynmap]: [Dynmap] Exception while loading chunks
08.08 23:30:53 [Server] INFO java.lang.NullPointerException: null
08.08 23:30:53 [Server] INFO at com.google.common.collect.ImmutableSetMultimap$Builder.putAll(ImmutableSetMultimap.java:317) ~[minecraft_server.1.12.2.jar:?]
08.08 23:30:53 [Server] INFO at net.minecraftforge.common.ForgeChunkManager.forceChunk(ForgeChunkManager.java:817) ~[ForgeChunkManager.class:?]
08.08 23:30:53 [Server] INFO at org.dynmap.forge.DynmapPlugin.setBusy(DynmapPlugin.java:270) ~[DynmapPlugin.class:?]
08.08 23:30:53 [Server] INFO at org.dynmap.forge.DynmapPlugin.setBusy(DynmapPlugin.java:254) ~[DynmapPlugin.class:?]
08.08 23:30:53 [Server] INFO at org.dynmap.forge.DynmapPlugin.access$1500(DynmapPlugin.java:106) ~[DynmapPlugin.class:?]
08.08 23:30:53 [Server] INFO at org.dynmap.forge.DynmapPlugin$ForgeServer$1.call(DynmapPlugin.java:765) ~[DynmapPlugin$ForgeServer$1.class:?]
08.08 23:30:53 [Server] INFO at org.dynmap.forge.DynmapPlugin$ForgeServer$1.call(DynmapPlugin.java:761) ~[DynmapPlugin$ForgeServer$1.class:?]
08.08 23:30:53 [Server] INFO at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_131]
08.08 23:30:53 [Server] INFO at org.dynmap.forge.DynmapPlugin$ForgeServer.tickEvent(DynmapPlugin.java:853) ~[DynmapPlugin$ForgeServer.class:?]
08.08 23:30:53 [Server] INFO at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_181_ForgeServer_tickEvent_ServerTickEvent.invoke(.dynamic) ~[?:?]
08.08 23:30:53 [Server] INFO at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) ~[ASMEventHandler.class:?]
08.08 23:30:53 [Server] INFO at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182) ~[EventBus.class:?]
08.08 23:30:53 [Server] INFO at net.minecraftforge.fml.common.FMLCommonHandler.onPostServerTick(FMLCommonHandler.java:265) ~[FMLCommonHandler.class:?]
08.08 23:30:53 [Server] INFO at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:712) ~[MinecraftServer.class:?]
08.08 23:30:53 [Server] INFO at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) ~[MinecraftServer.class:?]
08.08 23:30:53 [Server] INFO at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]