Essential is known to automatically install Fabric Language Kotlin, which conflicts with Quilt Kotlin Libraries. Manually remove either one of these mods and it should work.
Rule 1:
optional mod ‘qkl_core’ (2 sources)
- {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 /quilt-kotlin-libraries-2.1.3+kt.1.9.10+flk.1.10.10.jar!/META-INF/jars/quilt-kotlin-libraries-core-2.1.3+kt.1.9.10+flk.1.10.10.jar}
Rule 2:
Mandatory mod Quilt Kotlin Libraries (qkl) v2.1.3
Rule 3:
Dependency for {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl’ from /quilt-kotlin-libraries-2.1.3+kt.1.9.10+flk.1.10.10.jar} on qkl_core versions [>2.1.3] (1 valid options, 1 invalid options)
+ {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_core’ from /quilt-kotlin-libraries-2.1.3+kt.1.9.10+flk.1.10.10.jar!/META-INF/jars/quilt-kotlin-libraries-core-2.1.3+kt.1.9.10+flk.1.10.10.jar} {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_core’ from /quilt-kotlin-libraries-2.1.3+kt.1.9.10+flk.1.10.10.jar!/META-INF/jars/quilt-kotlin-libraries-core-2.1.3+kt.1.9.10+flk.1.10.10.jar}
x {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}
Rule 4:
Mandatory mod Quilt Kotlin Libraries: Core (qkl_core) v2.0.2
– Error 2 –
Unhandled solver error involving the following rules:
Rule 1:
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] (2 valid options, 1 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}
+ provided mod ‘fabric-language-kotlin’ from {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_core’ from /quilt-kotlin-libraries-2.1.3+kt.1.9.10+flk.1.10.10.jar!/META-INF/jars/quilt-kotlin-libraries-core-2.1.3+kt.1.9.10+flk.1.10.10.jar} {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_core’ from /quilt-kotlin-libraries-2.1.3+kt.1.9.10+flk.1.10.10.jar!/META-INF/jars/quilt-kotlin-libraries-core-2.1.3+kt.1.9.10+flk.1.10.10.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}
Rule 2:
Mandatory mod Essential Dependencies (essential-dependencies) v0
Rule 3:
Mandatory mod Quilt Kotlin Libraries: Core (qkl_core) v2.0.2
Rule 4:
optional mod ‘fabric-language-kotlin’ (3 sources)
- {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}
- {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_core’ from /quilt-kotlin-libraries-2.1.3+kt.1.9.10+flk.1.10.10.jar!/META-INF/jars/quilt-kotlin-libraries-core-2.1.3+kt.1.9.10+flk.1.10.10.jar}
– Error 3 –
Unhandled solver error involving the following rules:
Rule 1:
Mandatory mod Quilt Kotlin Libraries (qkl) v2.1.3
Rule 2:
Mandatory mod Quilt Kotlin Libraries: Library (qkl_library) v1.0.2
Rule 3:
Dependency for {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl’ from /quilt-kotlin-libraries-2.1.3+kt.1.9.10+flk.1.10.10.jar} on qkl_library versions [>2.1.3] (1 valid options, 1 invalid options)
+ {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_library’ from /quilt-kotlin-libraries-2.1.3+kt.1.9.10+flk.1.10.10.jar!/META-INF/jars/quilt-kotlin-libraries-library-2.1.3+kt.1.9.10+flk.1.10.10.jar} {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_library’ from /quilt-kotlin-libraries-2.1.3+kt.1.9.10+flk.1.10.10.jar!/META-INF/jars/quilt-kotlin-libraries-library-2.1.3+kt.1.9.10+flk.1.10.10.jar}
x {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_library’ from /library-1.0.2+kt.1.8.0+flk.1.9.0.jar} {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_library’ from /library-1.0.2+kt.1.8.0+flk.1.9.0.jar}
Rule 4:
optional mod ‘qkl_library’ (2 sources)
- {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_library’ from /library-1.0.2+kt.1.8.0+flk.1.9.0.jar}
- {org.quiltmc.loader.impl.plugin.quilt.QuiltModOption ‘qkl_library’ from /quilt-kotlin-libraries-2.1.3+kt.1.9.10+flk.1.10.10.jar!/META-INF/jars/quilt-kotlin-libraries-library-2.1.3+kt.1.9.10+flk.1.10.10.jar}