Complex solver Error when trying to launch the game

User Support
1

I updated Essentials today, and I am now getting this error when I try to launch the game, do I need to update Quilt Loader, and if I do, how do I do that?

Unhandled solver error involving the following rules:
Rule 1:
optional mod ‘fabric-language-kotlin’ (3 sources)
- {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_core’ from /quilt-kotlin-libraries-1.0.2+kt.1.8.0+flk.1.9.0(1).jar!/META-INF/jars/quilt-kotlin-libraries-core-1.0.2+kt.1.8.0+flk.1.9.0.jar}
- {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_core’ from /core-2.0.2+kt.1.8.20+flk.1.9.3.jar}
- {org.quiltmc.loader.impl.plugin.fabric.FabricModOption ‘fabric-language-kotlin’ from /Essential Dependencies.jar!/META-INF/jars/[email protected]+kotlin.1.9.10.jar}
Rule 2:
Mandatory mod Quilt Kotlin Libraries: Core (qkl_core) v2.0.2
Rule 3:
Mandatory mod Essential Dependencies (essential-dependencies) v0
Rule 4:
Dependency for {org.quiltmc.loader.impl.plugin.fabric.FabricModOption ‘essential-dependencies’ from /Essential Dependencies.jar} on fabric-language-kotlin versions [>1.10.10+kotlin.1.9.10] (1 valid options, 2 invalid options)
+ {org.quiltmc.loader.impl.plugin.fabric.FabricModOption ‘fabric-language-kotlin’ from /Essential Dependencies.jar!/META-INF/jars/[email protected]+kotlin.1.9.10.jar} {org.quiltmc.loader.impl.plugin.fabric.FabricModOption ‘fabric-language-kotlin’ from /Essential Dependencies.jar!/META-INF/jars/[email protected]+kotlin.1.9.10.jar}
x provided mod ‘fabric-language-kotlin’ from {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_core’ from /core-2.0.2+kt.1.8.20+flk.1.9.3.jar} {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_core’ from /core-2.0.2+kt.1.8.20+flk.1.9.3.jar}
x provided mod ‘fabric-language-kotlin’ from {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_core’ from /quilt-kotlin-libraries-1.0.2+kt.1.8.0+flk.1.9.0(1).jar!/META-INF/jars/quilt-kotlin-libraries-core-1.0.2+kt.1.8.0+flk.1.9.0.jar} {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_core’ from /quilt-kotlin-libraries-1.0.2+kt.1.8.0+flk.1.9.0(1).jar!/META-INF/jars/quilt-kotlin-libraries-core-1.0.2+kt.1.8.0+flk.1.9.0.jar}

2

Essential is known to automatically install Fabric Language Kotlin, which is incompatible with Quilt Kotlin Libraries. Manually delete either one and it should work.

Edit: also just in case your version is simply outdated, make sure you are using either this one QKL 2.1.3 + FLK 1.10.10 + Kotlin 1.9.10 - Quilt Kotlin Libraries (QKL) if you are on 1.20.1. Or, if using FLK - Fabric Language Kotlin 1.10.10+kotlin.1.9.10 - Fabric Language Kotlin. Note: the main QKL file is version dependent and you might want to specifically download the core file if you are not on 1.20.1 (second on the page I linked).

3

so I play on a custom modpack, i deleted this one quilt-kotlin-libraries-1.0.2+kt.1.8.0+flk.1.9.0, but no dice it still gives me that error,

4

Yeah, I’m pretty sure you simply need to update it. Either grab the second file from the QKL link or the main file from the FLK link. And double-check that only one is present when launching.

5

sadly it didn’t work, i tried either, i deleted my qkl and replaced with the new one, crashed same error, so i deleted my core one and got the new one, same issue

6

Can you send your full latest.log file located in .minecraft/logs/ via https://mclo.gs/, please?

7

i sent the crash report as my logs only mentions the crash and please check crash report :D, so i hope that works

8

You need to send me the resulting link after you upload the file. And if you don’t mind, still upload the latest log as well, because I want to take a look at your list of mods, but the crash reports that happen due to version incompatibilities don’t include them.

9

Quilt 1.19.2 Server Log [#PeMNm7c] - mclo.gs, i think i did this correctly lol, im new to this :smiley:

10

Yep, no worries. You need to remove the following files from your mods folder:
quilt-kotlin-libraries-1.0.2+kt.1.8.0+flk.1.9.0(1).jar
core-2.0.2+kt.1.8.20+flk.1.9.3.jar
library-1.0.2+kt.1.8.0+flk.1.9.0.jar
Then add this file https://cdn.modrinth.com/data/lwVhp9o5/versions/RYTef2Wb/quilt-kotlin-libraries-core-2.1.3%2Bkt.1.9.10%2Bflk.1.10.10.jar
That should work. If still doesn’t work, upload new logs and send the new link.

11

tyvm that worked, thank you for your time :smiley:

1 Like
12

This topic was automatically closed 7 days after the last reply. New replies are no longer allowed.