**Before filling out this issue: **
1. For major bugs, we only support BYG's latest version on a per Minecraft version basis(i.e latest for 1.15 is 1.0 while latest for 1.16 is 1.1).
2. Please test BYG on its own to confirm whether or not this is a mod conflict

Mod conflict? If so, please clarify which mod is conflicting, if not skip this.

API/Modloader
Forge

Describe the bug
What is the bug? Where/How does it occur? etc. When i load the game it says it encountered an error in the event phase

To Reproduce
Please provide step by step instructions. i downloaded the 1.1.0 version and optifine

Expected behavior
A clear and concise description of what you expected to happen. I thought it was gonna work

---- Minecraft Crash Report -------- Minecraft Crash Report ----// I feel sad now :(
Time: 2/23/21 7:49 PMDescription: Mod loading error has occurred
java.lang.Exception: Mod Loading has failed at net.minecraftforge.fml.CrashReportExtender.dumpModLoadingCrashReport(CrashReportExtender.java:85) ~[?:?] {re:classloading} at net.minecraftforge.fml.client.ClientModLoader.completeModLoading(ClientModLoader.java:188) ~[?:?] {re:classloading,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.lambda$null$1(Minecraft.java:508) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.util.Util.func_215077_a(Util.java:430) ~[?:?] {re:classloading,xf:OptiFine:default,re:mixin} at net.minecraft.client.Minecraft.lambda$new$2(Minecraft.java:504) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.gui.ResourceLoadProgressGui.func_230430_a_(ResourceLoadProgressGui.java:172) ~[?:?] {re:classloading,xf:OptiFine:default} at net.minecraft.client.renderer.GameRenderer.func_195458_a(GameRenderer.java:802) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:OptiFine:default} at net.minecraft.client.Minecraft.func_195542_b(Minecraft.java:976) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:607) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A} at net.minecraft.client.main.Main.main(Main.java:184) ~[1.16.5-forge-36.0.42.jar:?] {re:classloading,pl:runtimedistcleaner:A} at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_74] {} at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_74] {} at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_74] {} at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_74] {} at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) ~[forge-1.16.5-36.0.42.jar:36.0] {} at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?] {} at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?] {} at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?] {} at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?] {}

A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
-- Head --Thread: Render threadStacktrace: at corgiaoc.byg.config.json.subbiomedata.SubBiomeDataListHolderSerializer.deserialize(SubBiomeDataListHolderSerializer.java:85) ~[?:1.1.10] {re:classloading}-- MOD byg --Details: Mod File: byg-1.1.10.jar Failure message: Oh The Biomes You'll Go (byg) encountered an error during the common_setup event phase java.lang.NullPointerException: null Mod Version: 1.1.10 Mod Issue URL: https://github.com/CorgiTaco/BYG/issues Exception message: java.lang.NullPointerExceptionStacktrace: at corgiaoc.byg.config.json.subbiomedata.SubBiomeDataListHolderSerializer.deserialize(SubBiomeDataListHolderSerializer.java:85) ~[?:1.1.10] {re:classloading} at corgiaoc.byg.config.json.subbiomedata.SubBiomeDataListHolderSerializer.deserialize(SubBiomeDataListHolderSerializer.java:13) ~[?:1.1.10] {re:classloading} at com.google.gson.internal.bind.TreeTypeAdapter.read(TreeTypeAdapter.java:69) ~[gson-2.8.0.jar:?] {} at com.google.gson.Gson.fromJson(Gson.java:887) ~[gson-2.8.0.jar:?] {} at com.google.gson.Gson.fromJson(Gson.java:825) ~[gson-2.8.0.jar:?] {} at corgiaoc.byg.config.json.BYGJsonConfigHandler.handleBYGSubBiomesJSONConfig(BYGJsonConfigHandler.java:222) ~[?:1.1.10] {re:classloading} at corgiaoc.byg.config.json.BYGJsonConfigHandler.handleOverWorldConfig(BYGJsonConfigHandler.java:65) ~[?:1.1.10] {re:classloading} at corgiaoc.byg.BYG.commonSetup(BYG.java:81) ~[?:1.1.10] {re:classloading} at net.minecraftforge.eventbus.EventBus.doCastFilter(EventBus.java:247) ~[eventbus-4.0.0.jar:?] {} at net.minecraftforge.eventbus.EventBus.lambda$addListener$11(EventBus.java:239) ~[eventbus-4.0.0.jar:?] {} at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302) ~[eventbus-4.0.0.jar:?] {} at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283) ~[eventbus-4.0.0.jar:?] {} at net.minecraftforge.fml.javafmlmod.FMLModContainer.acceptEvent(FMLModContainer.java:120) ~[?:36.0] {re:classloading} at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$4(ModContainer.java:121) ~[?:?] {re:classloading} at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1626) ~[?:1.8.0_74] {} at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1618) ~[?:1.8.0_74] {} at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289) ~[?:1.8.0_74] {} at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056) ~[?:1.8.0_74] {} at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692) ~[?:1.8.0_74] {re:computing_frames} at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157) ~[?:1.8.0_74] {}

-- System Details --Details: Minecraft Version: 1.16.5 Minecraft Version ID: 1.16.5 Operating System: Mac OS X (x86_64) version 10.14.6 Java Version: 1.8.0_74, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 1021803184 bytes (974 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB) CPUs: 4 JVM Flags: 8 total; -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M ModLauncher: 8.0.9+86+master.3cf110c ModLauncher launch target: fmlclient ModLauncher naming: srg ModLauncher services: /mixin-0.8.2.jar mixin PLUGINSERVICE /eventbus-4.0.0.jar eventbus PLUGINSERVICE /forge-1.16.5-36.0.42.jar object_holder_definalize PLUGINSERVICE /forge-1.16.5-36.0.42.jar runtime_enum_extender PLUGINSERVICE /accesstransformers-3.0.1.jar accesstransformer PLUGINSERVICE /forge-1.16.5-36.0.42.jar capability_inject_definalize PLUGINSERVICE /forge-1.16.5-36.0.42.jar runtimedistcleaner PLUGINSERVICE /mixin-0.8.2.jar mixin TRANSFORMATIONSERVICE /OptiFine_1.16.5_HD_U_G7%20copy.jar OptiFine TRANSFORMATIONSERVICE /forge-1.16.5-36.0.42.jar fml TRANSFORMATIONSERVICE FML: 36.0 Forge: net.minecraftforge:36.0.42 FML Language Providers: [email protected] minecraft@1 Mod List: forge-1.16.5-36.0.42-client.jar |Minecraft |minecraft |1.16.5 |SIDED_SETU|NOSIGNATURE byg-1.1.10.jar |Oh The Biomes You'll Go |byg |1.1.10 |ERROR |NOSIGNATURE forge-1.16.5-36.0.42-universal.jar |Forge |forge |36.0.42 |SIDED_SETU|22:af:21:d8:19:82:7f:93:94:fe:2b:ac:b7:e4:41:57:68:39:87:b1:a7:5c:c6:44:f9:25:74:21:14:f5:0d:90 dungeons_plus-1.16.4-1.1.3.jar |Dungeons Plus |dungeons_plus |1.1.3 |SIDED_SETU|NOSIGNATURE structure_gel-1.16.4-1.7.5.jar |Structure Gel API |structure_gel |1.7.5 |SIDED_SETU|NOSIGNATURE citadel-1.6.1.jar |Citadel |citadel |1.6.1 |SIDED_SETU|NOSIGNATURE alexsmobs-1.6.0 copy.jar |Alex's Mobs |alexsmobs |1.6.0 |SIDED_SETU|NOSIGNATURE Crash Report UUID: 351125e6-aa29-4c58-b90e-f8ac40ef2eaa OptiFine Version: OptiFine_1.16.5_HD_U_G7 OptiFine Build: 20210219-144623 Render Distance Chunks: 8 Mipmaps: 4 Anisotropic Filtering: 1 Antialiasing: 0 Multitexture: false Shaders: null OpenGlVersion: 2.1 INTEL-12.10.22 OpenGlRenderer: Intel(R) UHD Graphics 617 OpenGlVendor: Intel Inc. CpuCount: 4

Debug.log -
Latest.log -

Heap Dumps
If performance, please provide a heap dump/some sort of profile of your game(I recommend: https://visualvm.github.io/download.html)
Heap Dump/Profile -

Delete all byg configs