I'm a novice at this, sorry.

I placed a tree beacon into a multiplayer world, fairly close to my Luminous Crafting Table.

I then placed a birch sapling about 4 blocks away and a block down.

I used bonemeal to accelerate the birch sapling's development.

My game then crashed, and I cannot rejoin the server.

Crash log:
Time: 12/16/20 10:22 AM
Description: Tesselating block model

java.lang.IllegalStateException: Not filled all elements of the vertex
at net.minecraft.client.renderer.BufferBuilder.func_181675_d(BufferBuilder.java:225) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at hellfirepvp.observerlib.client.util.BufferDecoratorBuilder$DecoratedBuilder.func_181675_d(BufferDecoratorBuilder.java:193) ~[?:1.16.4-1.4.4] {re:classloading}
at net.minecraftforge.client.model.pipeline.VertexBufferConsumer.put(VertexBufferConsumer.java:81) ~[?:?] {re:classloading}
at net.minecraftforge.client.model.pipeline.VertexLighterFlat.processQuad(VertexLighterFlat.java:257) ~[?:?] {re:classloading}
at net.minecraftforge.client.model.pipeline.QuadGatheringTransformer.put(QuadGatheringTransformer.java:66) ~[?:?] {re:classloading}
at net.minecraftforge.client.model.pipeline.LightUtil.putBakedQuad(LightUtil.java:110) ~[?:?] {re:classloading}
at net.minecraft.client.renderer.model.BakedQuad.pipe(BakedQuad.java:42) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraftforge.client.model.pipeline.ForgeBlockModelRenderer.render(ForgeBlockModelRenderer.java:122) ~[?:?] {re:classloading}
at net.minecraftforge.client.model.pipeline.ForgeBlockModelRenderer.renderModelSmooth(ForgeBlockModelRenderer.java:85) ~[?:?] {re:classloading}
at net.minecraft.client.renderer.BlockModelRenderer.renderModel(BlockModelRenderer.java:51) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.renderer.BlockRendererDispatcher.renderModel(BlockRendererDispatcher.java:63) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
at hellfirepvp.astralsorcery.client.util.RenderingUtils.renderSimpleBlockModel(RenderingUtils.java:561) ~[?:1.16.4-1.13.1] {re:classloading}
at hellfirepvp.astralsorcery.client.render.tile.RenderTileFakedState.render(RenderTileFakedState.java:61) ~[?:1.16.4-1.13.1] {re:classloading}
at hellfirepvp.astralsorcery.client.render.tile.RenderTileFakedState.func_225616_a_(RenderTileFakedState.java:34) ~[?:1.16.4-1.13.1] {re:classloading}
at net.minecraft.client.renderer.tileentity.TileEntityRendererDispatcher.func_228855_a_(TileEntityRendererDispatcher.java:101) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.renderer.tileentity.TileEntityRendererDispatcher.lambda$renderTileEntity$0(TileEntityRendererDispatcher.java:85) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.renderer.tileentity.TileEntityRendererDispatcher$$Lambda$16908/1933144671.run(Unknown Source) ~[?:?] {}
at net.minecraft.client.renderer.tileentity.TileEntityRendererDispatcher.func_228853_a_(TileEntityRendererDispatcher.java:118) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.renderer.tileentity.TileEntityRendererDispatcher.func_228850_a_(TileEntityRendererDispatcher.java:84) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.renderer.WorldRenderer.func_228426_a_(WorldRenderer.java:1038) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:immersiveengineering:IE render hook after tile rendering,pl:mixin:APP:betterweather.mixins.json:client.MixinWorldRenderer,pl:mixin:APP:assets/botania/botania.mixins.json:AccessorWorldRenderer,pl:mixin:APP:assets/botania/botania.mixins.json:MixinWorldRenderer,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.renderer.GameRenderer.func_228378_a_(GameRenderer.java:607) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:fml:astralsorcery:reach_set_client_renderer,xf:fml:fairylights:GameRendererTransformer,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.renderer.GameRenderer.func_195458_a(GameRenderer.java:425) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:fml:astralsorcery:reach_set_client_renderer,xf:fml:fairylights:GameRendererTransformer,pl:runtimedistcleaner:A,re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_195542_b(Minecraft.java:976) [?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:randompatches:RandomPatches Minecraft Transformer,pl:mixin:APP:charm.mixins.json:accessor.MinecraftAccessor,pl:mixin:APP:mining_helmet.mixins.json:MinecraftMixin,pl:mixin:APP:kubejs.mixins.json:MinecraftMixin,pl:mixin:APP:valhelsia_tweaks.mixins.json:RemoveExperimentalSettingsWarningMixin,pl:mixin:APP:valhelsia_tweaks.mixins.json:DisplayMemoryWarningScreenMixin,pl:mixin:APP:assets/botania/botania.mixins.json:AccessorMinecraft,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:607) [?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:randompatches:RandomPatches Minecraft Transformer,pl:mixin:APP:charm.mixins.json:accessor.MinecraftAccessor,pl:mixin:APP:mining_helmet.mixins.json:MinecraftMixin,pl:mixin:APP:kubejs.mixins.json:MinecraftMixin,pl:mixin:APP:valhelsia_tweaks.mixins.json:RemoveExperimentalSettingsWarningMixin,pl:mixin:APP:valhelsia_tweaks.mixins.json:DisplayMemoryWarningScreenMixin,pl:mixin:APP:assets/botania/botania.mixins.json:AccessorMinecraft,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.main.Main.main(Main.java:184) [?:?] {re:classloading,pl:runtimedistcleaner:A}
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] {}
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51] {}
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51] {}
at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) [forge-1.16.4-35.1.4.jar:35.1] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$477/244839708.call(Unknown Source) [forge-1.16.4-35.1.4.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:?] {re:classloading}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.6.jar:?] {re:classloading}

Massively out of date version. Please update AS to latest (1.13.6 at this time).

#1502