[01:26:01 INFO]: [SuperiorSkyblock] Calculating islands...
[01:26:01 ERROR]: Failed to save chunk 1,36
net.minecraft.server.v1_14_R1.ReportedException: Writing into PalettedContainer from multiple threads (other thread: name: SuperiorSkyblock Thread 0, class: class java.lang.Thread)
        at net.minecraft.server.v1_14_R1.DataPaletteBlock.a(DataPaletteBlock.java:41) ~[patched_1.14.4.jar:git-Paper-242]
        at net.minecraft.server.v1_14_R1.DataPaletteBlock.a(DataPaletteBlock.java:239) ~[patched_1.14.4.jar:git-Paper-242]
        at net.minecraft.server.v1_14_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:410) ~[patched_1.14.4.jar:git-Paper-242]
        at net.minecraft.server.v1_14_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:362) ~[patched_1.14.4.jar:git-Paper-242]
        at net.minecraft.server.v1_14_R1.PlayerChunkMap.saveChunk(PlayerChunkMap.java:929) ~[patched_1.14.4.jar:git-Paper-242]
        at net.minecraft.server.v1_14_R1.PlayerChunkMap.saveIncrementally(PlayerChunkMap.java:336) ~[patched_1.14.4.jar:git-Paper-242]
        at net.minecraft.server.v1_14_R1.ChunkProviderServer.saveIncrementally(ChunkProviderServer.java:489) ~[patched_1.14.4.jar:git-Paper-242]
        at net.minecraft.server.v1_14_R1.WorldServer.saveIncrementally(WorldServer.java:893) ~[patched_1.14.4.jar:git-Paper-242]
        at net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:1124) ~[patched_1.14.4.jar:git-Paper-242]
        at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:925) ~[patched_1.14.4.jar:git-Paper-242]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_231]
Caused by: java.lang.IllegalStateException
        at net.minecraft.server.v1_14_R1.DataPaletteBlock.a(DataPaletteBlock.java:37) ~[patched_1.14.4.jar:git-Paper-242]
        ... 10 more