totw_modded-forge-1.20.1-1.0.5.jar
Forge 47.3.5

[02:13:39] [Render thread/ERROR] [minecraft/ServerAdvancementManager]: Parsing error loading custom advancement totw_modded:root: Expected item to be an item, was unknown string 'waystones:mossy_waystone'

3665 | [02:13:39] [Render thread/ERROR] [minecraft/AdvancementList]: Couldn't load advancement totw_modded:regular_tower: Task Advancement{parentId=totw_modded:root, display=net.minecraft.advancements.DisplayInfo@6ec38ca0, rewards=AdvancementRewards{experience=0, loot=[], recipes=[], function=net.minecraft.commands.CommandFunction$CacheableFunction@40cf30ee}, criteria={regular=net.minecraft.advancements.Criterion@f84f1d8}, requirements=[[regular]], sends_telemetry_event=false}
3666 | [02:13:39] [Render thread/ERROR] [minecraft/AdvancementList]: Couldn't load advancement totw_modded:derelict_grass_tower: Task Advancement{parentId=totw_modded:root, display=net.minecraft.advancements.DisplayInfo@31a57ad6, rewards=AdvancementRewards{experience=0, loot=[], recipes=[], function=net.minecraft.commands.CommandFunction$CacheableFunction@40cf30ee}, criteria={derelict_grass=net.minecraft.advancements.Criterion@1987470b}, requirements=[[derelict_grass]], sends_telemetry_event=false}
3667 | [02:13:39] [Render thread/ERROR] [minecraft/AdvancementList]: Couldn't load advancement totw_modded:derelict_tower: Task Advancement{parentId=totw_modded:root, display=net.minecraft.advancements.DisplayInfo@2b7e6f2a, rewards=AdvancementRewards{experience=0, loot=[], recipes=[], function=net.minecraft.commands.CommandFunction$CacheableFunction@40cf30ee}, criteria={derelict=net.minecraft.advancements.Criterion@8e2ca51}, requirements=[[derelict]], sends_telemetry_event=false}
3668 | [02:13:39] [Render thread/ERROR] [minecraft/AdvancementList]: Couldn't load advancement totw_modded:ice_tower: Task Advancement{parentId=totw_modded:root, display=net.minecraft.advancements.DisplayInfo@7bf95780, rewards=AdvancementRewards{experience=0, loot=[], recipes=[], function=net.minecraft.commands.CommandFunction$CacheableFunction@40cf30ee}, criteria={ice=net.minecraft.advancements.Criterion@6557baec}, requirements=[[ice]], sends_telemetry_event=false}
3669 | [02:13:39] [Render thread/ERROR] [minecraft/AdvancementList]: Couldn't load advancement totw_modded:jungle_tower: Task Advancement{parentId=totw_modded:root, display=net.minecraft.advancements.DisplayInfo@1ce4d395, rewards=AdvancementRewards{experience=0, loot=[], recipes=[], function=net.minecraft.commands.CommandFunction$CacheableFunction@40cf30ee}, criteria={jungle=net.minecraft.advancements.Criterion@443c9a3f}, requirements=[[jungle]], sends_telemetry_event=false}

And these are just not installed mods, sorry

But there is also the truth with achievements

[16:40:12] [Render thread/ERROR] [minecraft/AdvancementList]: Couldn't load advancement totw_modded:derelict_grass_tower: Task Advancement{parentId=totw_modded:root, display=net.minecraft.advancements.DisplayInfo@63276c86, rewards=AdvancementRewards{experience=0, loot=[], recipes=[], function=net.minecraft.commands.CommandFunction$CacheableFunction@da44e46}, criteria={derelict_grass=net.minecraft.advancements.Criterion@25c202e7}, requirements=[[derelict_grass]], sends_telemetry_event=false}

2736 | [16:40:12] [Render thread/ERROR] [minecraft/AdvancementList]: Couldn't load advancement totw_modded:derelict_tower: Task Advancement{parentId=totw_modded:root, display=net.minecraft.advancements.DisplayInfo@2b51f472, rewards=AdvancementRewards{experience=0, loot=[], recipes=[], function=net.minecraft.commands.CommandFunction$CacheableFunction@da44e46}, criteria={derelict=net.minecraft.advancements.Criterion@1e311ec5}, requirements=[[derelict]], sends_telemetry_event=false}
2737 | [16:40:12] [Render thread/ERROR] [minecraft/AdvancementList]: Couldn't load advancement totw_modded:ice_tower: Task Advancement{parentId=totw_modded:root, display=net.minecraft.advancements.DisplayInfo@6ee1c6fe, rewards=AdvancementRewards{experience=0, loot=[], recipes=[], function=net.minecraft.commands.CommandFunction$CacheableFunction@da44e46}, criteria={ice=net.minecraft.advancements.Criterion@78303ad1}, requirements=[[ice]], sends_telemetry_event=false}
2738 | [16:40:12] [Render thread/ERROR] [minecraft/AdvancementList]: Couldn't load advancement totw_modded:jungle_tower: Task Advancement{parentId=totw_modded:root, display=net.minecraft.advancements.DisplayInfo@3c41bc68, rewards=AdvancementRewards{experience=0, loot=[], recipes=[], function=net.minecraft.commands.CommandFunction$CacheableFunction@da44e46}, criteria={jungle=net.minecraft.advancements.Criterion@455eff83}, requirements=[[jungle]], sends_telemetry_event=false}