New Forge version - Ice and Fire mod

-- MOD iceandfire --
Details:
    Caused by 0: java.lang.ExceptionInInitializerError
        at com.github.alexthe666.iceandfire.IceAndFire.<init>(IceAndFire.java:83) ~[iceandfire:2.1.0-1.16.3] {re:classloading}
        at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] {re:classloading,re:classloading,re:classloading,re:classloading,re:classloading}
        at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:?] {re:classloading,re:classloading,re:classloading,re:classloading,re:classloading}
        at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?] {re:classloading,re:classloading,re:classloading,re:classloading,re:classloading}
        at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500) ~[?:?] {}
        at java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:124) ~[?:?] {}
        at jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:346) ~[?:?] {re:classloading,re:classloading,re:classloading,re:classloading,re:classloading}
        at java.lang.Class.newInstance(Class.java:604) ~[?:?] {}
        at net.minecraftforge.fml.javafmlmod.FMLModContainer.constructMod(FMLModContainer.java:81) ~[forge:34.1] {re:classloading}
        at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$4(ModContainer.java:110) ~[forge:?] {re:classloading}
        at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1800) ~[?:?] {}
        at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1792) ~[?:?] {}
        at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) ~[?:?] {}
        at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016) ~[?:?] {}
        at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665) ~[?:?] {re:computing_frames}
        at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598) ~[?:?] {re:computing_frames}
        at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) ~[?:?] {}

    Mod File: iceandfire-2.1.0-1.16.3.jar
    Failure message: Ice and Fire (iceandfire) has failed to load correctly
        java.lang.ExceptionInInitializerError: null
    Mod Version: 2.0.3-1.16.3
    Mod Issue URL: https://github.com/Alex-the-666/ice-and-fire/issues
    Exception message: java.lang.IllegalStateException: Can not register to a locked registry. Modder should use Forge Register methods.
Stacktrace:
    at net.minecraftforge.registries.NamespacedWrapper.register(NamespacedWrapper.java:56) ~[forge:?] {re:classloading}
    at net.minecraftforge.registries.NamespacedWrapper.register(NamespacedWrapper.java:72) ~[forge:?] {re:classloading}
    at net.minecraftforge.registries.NamespacedWrapper.func_218381_a(NamespacedWrapper.java:40) ~[forge:?] {re:classloading}
    at net.minecraft.util.registry.Registry.func_218322_a(Registry.java:456) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
    at net.minecraft.util.registry.Registry.func_218325_a(Registry.java:452) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
    at com.github.alexthe666.iceandfire.world.IafWorldRegistry.func_236394_a_(IafWorldRegistry.java:150) ~[iceandfire:2.1.0-1.16.3] {re:classloading}
    at com.github.alexthe666.iceandfire.world.IafWorldRegistry.<clinit>(IafWorldRegistry.java:50) ~[iceandfire:2.1.0-1.16.3] {re:classloading}
    at com.github.alexthe666.iceandfire.IceAndFire.<init>(IceAndFire.java:83) ~[iceandfire:2.1.0-1.16.3] {re:classloading}
    at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] {re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading}
    at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:?] {re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading}
    at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?] {re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading}
    at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500) ~[?:?] {}
    at java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:124) ~[?:?] {}
    at jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:346) ~[?:?] {re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading,re:classloading}
    at java.lang.Class.newInstance(Class.java:604) ~[?:?] {}
    at net.minecraftforge.fml.javafmlmod.FMLModContainer.constructMod(FMLModContainer.java:81) ~[forge:34.1] {re:classloading}
    at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$4(ModContainer.java:110) ~[forge:?] {re:classloading}
    at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1800) ~[?:?] {}
    at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1792) ~[?:?] {}
    at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) ~[?:?] {}
    at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016) ~[?:?] {}
    at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665) ~[?:?] {re:computing_frames}
    at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598) ~[?:?] {re:computing_frames}
    at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) ~[?:?] {}