Luis_ST

This is a Forge forum, MCreator is not supported on this forum learn java and come back when you know the basics

post full debug log

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can you post the full debug log

post debug log

did you use other mod on the server? because the problem is this class: 'hu.montlikadani.tablist.bukkit.tablist.groups.impl.ReflectionHandled' but i can't find the class in your repo i think the code which throws the NullPointerException is client side which would explain why there is no problem in the single player

its Luis-st

then run the installer via cmd and post output

when you run the luncher he will create a file post it

post the luncher log

i think you can use the same way, but i have no idea whats happen when the other mod is not installed if you extends the vanilla chest you can set the loot table via setLootTable

you need to use Biome.Builder look at the BiomeMaker for an example

you can replace the LootTable using a datapack (for vanilla), use the following path in your data folder of your mod: data/minecraft/loot_tables/chests/spawn_bonus_chest.json

is the chest a custom one or the vanilla?

you then no longer need BiomeManager#addAdditionalOverworldBiomes you also need to call BiomeDictionary#addTypes

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can you post a git repo of your mod?

this contains all entities you need to ckeck if the Entity is an instance of ItemFrameEntity or you use show your code because i think there is a error in your code

its 'cross' and not 'all' in textures

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why?

no i mean this: Registry.register(Registry.BIOME_SOURCE, new ResourceLocation("mod_id", "provider_name"), codec_of_the_provider);

use BiomeManager#addBiome