Mod crashes when used on forge server, please help

I don't know if this is the right place to put this, my mod crashes whenever I load it on a forge server, here's the crash log, any help would be appreciated!

---- Minecraft Crash Report ----
// Who set us up the TNT?

Time: 2/22/21 9:24 AM
Description: Mod loading error has occurred

java.lang.Exception: Mod Loading has failed
	at net.minecraftforge.fml.CrashReportExtender.dumpModLoadingCrashReport(CrashReportExtender.java:85) ~[forge:?] {re:classloading}
	at net.minecraftforge.fml.server.ServerModLoader.load(ServerModLoader.java:51) ~[forge:?] {re:classloading}
	at net.minecraft.server.Main.main(Main.java:95) ~[?:?] {re:classloading}
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_271] {}
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_271] {}
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_271] {}
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_271] {}
	at net.minecraftforge.fml.loading.FMLServerLaunchProvider.lambda$launchService$0(FMLServerLaunchProvider.java:51) ~[forge-1.16.4-35.1.12.jar:35.1] {}
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.6.jar:?] {}
	at net.minecraftforge.server.ServerMain$Runner.runLauncher(ServerMain.java:63) [forge-1.16.4-35.1.12.jar:?] {}
	at net.minecraftforge.server.ServerMain$Runner.access$100(ServerMain.java:60) [forge-1.16.4-35.1.12.jar:?] {}
	at net.minecraftforge.server.ServerMain.main(ServerMain.java:57) [forge-1.16.4-35.1.12.jar:?] {}


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: main
Stacktrace:
	at net.mcreator.explorationexpansion.world.biome.QuartzValleyBiome$BiomeRegisterHandler.registerBiomes(QuartzValleyBiome.java:57) ~[exploration_expansion:?] {re:classloading,pl:eventbus:A}
-- MOD exploration_expansion --
Details:
	Mod File: waahhh.jar
	Failure message: Exploration Expansion (exploration_expansion) encountered an error during the load_registries event phase
		java.lang.NullPointerException: null
	Mod Version: 1.0.0
	Mod Issue URL: NOT PROVIDED
	Exception message: java.lang.NullPointerException
Stacktrace:
	at net.mcreator.explorationexpansion.world.biome.QuartzValleyBiome$BiomeRegisterHandler.registerBiomes(QuartzValleyBiome.java:57) ~[exploration_expansion:?] {re:classloading,pl:eventbus:A}
	at net.minecraftforge.eventbus.ASMEventHandler_89_BiomeRegisterHandler_registerBiomes_Register.invoke(.dynamic) ~[?:?] {}
	at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85) ~[eventbus-3.0.5-service.jar:?] {}
	at net.minecraftforge.eventbus.EventBus.post(EventBus.java:297) ~[eventbus-3.0.5-service.jar:?] {}
	at net.minecraftforge.fml.javafmlmod.FMLModContainer.acceptEvent(FMLModContainer.java:120) ~[forge:35.1] {re:classloading}
	at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$4(ModContainer.java:121) ~[forge:?] {re:classloading}
	at java.util.concurrent.CompletableFuture$AsyncRun.run(Unknown Source) ~[?:1.8.0_271] {}
	at net.minecraftforge.fml.ModWorkManager$SyncExecutor.driveOne(ModWorkManager.java:56) ~[forge:?] {re:classloading}
	at net.minecraftforge.fml.ModWorkManager$DrivenExecutor.drive(ModWorkManager.java:40) ~[forge:?] {re:classloading}
	at net.minecraftforge.fml.ModLoader.waitForTransition(ModLoader.java:243) ~[forge:?] {re:classloading}
	at net.minecraftforge.fml.ModLoader.dispatchAndHandleError(ModLoader.java:230) ~[forge:?] {re:classloading}
	at net.minecraftforge.fml.ModLoader.gatherAndInitializeMods(ModLoader.java:196) ~[forge:?] {re:classloading}
	at net.minecraftforge.fml.server.ServerModLoader.load(ServerModLoader.java:44) ~[forge:?] {re:classloading}
	at net.minecraft.server.Main.main(Main.java:95) ~[?:?] {re:classloading}
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_271] {}
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_271] {}
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_271] {}
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_271] {}
	at net.minecraftforge.fml.loading.FMLServerLaunchProvider.lambda$launchService$0(FMLServerLaunchProvider.java:51) ~[forge-1.16.4-35.1.12.jar:35.1] {}
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.6.jar:?] {}
	at net.minecraftforge.server.ServerMain$Runner.runLauncher(ServerMain.java:63) [forge-1.16.4-35.1.12.jar:?] {}
	at net.minecraftforge.server.ServerMain$Runner.access$100(ServerMain.java:60) [forge-1.16.4-35.1.12.jar:?] {}
	at net.minecraftforge.server.ServerMain.main(ServerMain.java:57) [forge-1.16.4-35.1.12.jar:?] {}


-- System Details --
Details:
	Minecraft Version: 1.16.4
	Minecraft Version ID: 1.16.4
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_271, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 136499488 bytes (130 MB) / 860356608 bytes (820 MB) up to 1757937664 bytes (1676 MB)
	CPUs: 6
	JVM Flags: 0 total; 
	ModLauncher: 8.0.6+85+master.325de55
	ModLauncher launch target: fmlserver
	ModLauncher naming: srg
	ModLauncher services: 
		/mixin-0.8.2.jar mixin PLUGINSERVICE 
		/eventbus-3.0.5-service.jar eventbus PLUGINSERVICE 
		/forge-1.16.4-35.1.12.jar object_holder_definalize PLUGINSERVICE 
		/forge-1.16.4-35.1.12.jar runtime_enum_extender PLUGINSERVICE 
		/accesstransformers-2.2.0-shadowed.jar accesstransformer PLUGINSERVICE 
		/forge-1.16.4-35.1.12.jar capability_inject_definalize PLUGINSERVICE 
		/forge-1.16.4-35.1.12.jar runtimedistcleaner PLUGINSERVICE 
		/mixin-0.8.2.jar mixin TRANSFORMATIONSERVICE 
		/forge-1.16.4-35.1.12.jar fml TRANSFORMATIONSERVICE 
	FML: 35.1
	Forge: net.minecraftforge:35.1.12
	FML Language Providers: 
		javafml@35.1
		minecraft@1
	Mod List: 
		forge-1.16.4-35.1.12-server.jar                   |Minecraft                     |minecraft                     |1.16.4              |COMMON_SET|NOSIGNATURE
		forge-1.16.4-35.1.12-universal.jar                |Forge                         |forge                         |35.1.12             |COMMON_SET|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
		waahhh.jar                                        |Exploration Expansion         |exploration_expansion         |1.0.0               |VALIDATE  |NOSIGNATURE
	Crash Report UUID: 7ac2febb-8fe5-4693-b318-beec5615a041