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You've installed the player module but not the "core" module that it needs. https://www.curseforge.com/minecraft/mc-mods/adaptive-performance-tweaks-core

There's no such block tag as minecraft:cobblestone https://github.com/misode/mcmeta/tree/data/data/minecraft/tags/blocks There is a forge:cobblestone/normal https://github.com/MinecraftForge/MinecraftForge/blob/1.19.x/src/generated/resources/data/forge/tags/blocks/cobblestone/normal.json Or you can change your GLM to use a LootItemCondition that matches a specific block instead of a block tag.

When you are in the game, look at the block and press F3. On the right hand side you can see what tags it has. You should also look at run/logs/debug.log because you have lots of errors in your datapack. The one stopping your blocks being mined is because this deepslate ore block does not exist. So it fails to load that file. https://github.com/Nexeran/Mundane_Chronicles_Mod/blob/505bfda1db4d6d761309dad63b787ea3d1731d68/src/main/resources/data/minecraft/tags/blocks/mineable/pickaxe.json#L6

It's an FAQ. But

Use java 17, mixin does not support java 19