Guidefor players2 min read
Yet Another Config Lib (YACL v3): Complete Setup and Troubleshooting Guide
Why modern Minecraft mods require Yet Another Config Lib (YACL), how to install YACL v3 on Fabric, NeoForge, and Quilt, and how to fix config screen crashes.
What is Yet Another Config Lib (YACL)?
If you have installed popular optimization or utility mods recently, you have likely seen Yet Another Config Lib (frequently referenced in log files and crash reports as yet_another_config_lib_v3 or yacl).
YACL is an open-source GUI and configuration management library created by isXander. Instead of every mod developer writing hundreds of lines of custom OpenGL rendering code for their settings menus, YACL provides:
- Smooth UI animations and consistent Minecraft-themed widgets.
- Searchable settings menus with categorization.
- Real-time option previews (useful for shader and visual tweaks).
- Seamless integration with Mod Menu on Fabric and Quilt.
Why Many Modern Mods Require YACL
Prominent mods in the Minecraft ecosystem depend on YACL to render their in-game settings:
- Iris Shaders: Modern versions of Iris rely on YACL for shader pack configuration sliders and advanced lighting toggles.
- Sodium Extra / Reese's Sodium Options: Expanded video settings tabs.
- Zoomify: Intuitive keybinding and zoom transition options.
- Controlify: Full gamepad and controller layout customization.
Without YACL installed, launching Minecraft with any of these mods will trigger a crash or an "Incompatible mods found" warning dialog.
How to Install YACL Correctly
- Check your Minecraft version (e.g.,
1.21.11,26.1, or26.2). - Identify your active Mod Loader (Fabric, NeoForge, or Quilt).
- Download the matching build of Yet Another Config Lib v3 from official sources (Modrinth or CurseForge).
- Place the
.jarfile directly into your.minecraft/mods/folder. - Launch the game. If you have Mod Menu installed on Fabric, you can access YACL settings directly from the main menu Mods button.
Common YACL Errors and Fixes
1. Incompatible mod set! net.fabricmc.loader.api.ModResolutionException: Mod 'yet_another_config_lib_v3' requires...
This error occurs when you have installed a YACL build compiled for an older or newer Minecraft version than the one you are running. Always ensure the [MC Version] matches your client.
2. Duplicate YACL Jars
Some mods bundle YACL inside their own jar (JiJ - Jar-in-Jar), while others require an external download. If you experience class loading conflicts, check your mods folder for older yacl-*.jar files and remove obsolete versions.
