"Error: java.lang.NoClassDefFoundError:vazkii/arl/item/BasicItem" crash upon launching game

[Xoooner]

Hi, I'm trying to make a modpack for my friends and I keep getting this error when I launch the game.

debug.log: https://pastebin.com/X9YL8dfC

mod list: https://imgur.com/a/xe11tWI

 

 

 

[warjort]

java.lang.ClassNotFoundException: vazkii.arl.item.BasicItem

The error you reported in the title is because you are missing the AutoRegLib mod.

 

But you also have

Quote

[12Sep2022 14:50:32.463] [Render thread/FATAL] [net.minecraftforge.fml.ModLoader/CORE]: Error during pre-loading phase

net.minecraftforge.fml.ModLoadingException: Mod §eadhooks§r requires §6forgeendertech§r §o9.0.0.0 or above§r

§7Currently, §6forgeendertech§r§7 is §o§nnot installed

at net.minecraftforge.fml.ModLoadingException.lambda$fromEarlyException$0(ModLoadingException.java:50) ~[fmlcore-1.18.2-40.1.68.jar%23119!/:?]

 

But I think you have a lot of these kinds of errors:

e.g. trying to run a mod for 1.19 with 1.18

Quote

[12Sep2022 14:50:12.608] [main/ERROR] [net.minecraftforge.fml.loading.LanguageLoadingProvider/LOADING]: Missing language javafml version [41,) wanted by NethersDelight-1.19-3.0.jar, found 40

And this large list of missing mods, the reference to "forge" in this list is the mod that wants forge for minecraft 1.19:

Quote

[12Sep2022 14:50:12.614] [main/ERROR] [net.minecraftforge.fml.loading.ModSorter/LOADING]: Missing mandatory dependencies: forgeendertech, yungsapi, yungsapi, terrablender, cucumber, expandability, geckolib3, forgeendertech, codechickenlib, curios, yungsapi, curios, sophisticatedcore, placebo, autoreglib, architectury, feature_nbt_deadlock_be_gone, geckolib3, mantle, supermartijn642configlib, supermartijn642corelib, cyclopscore, patchouli, paucal, insanelib, yungsapi, cyclopscore, balm, forge, patchouli, majruszlib, placebo, cucumber, curios, yungsapi

 

[Xoooner]

to fix the issues will i have to go through the missing mods and download them? i have removed nethers delight for now and have added autoreglib

[warjort]

yes and when you do, check to see if these new mods have other dependencies by looking at their mod page on curseforge.

Mod authors usually list their dependencies in prominent text because they get tired of answering the same questions about why their mod won't work. 🙂