Wrong Minecraft version

AbstractMethodError: Missing method_4199 of class_3887 When Rendering Player

What it looks like in the log

java.lang.AbstractMethodError: Missing implementation of resolved method 'abstract void method_4199(net.minecraft.class_4587, net.minecraft.class_4597

How to fix it

  1. Check your `mods` folder for **Cicada** (`cicada-lib`) and update it to the latest version built specifically for your Minecraft version (e.g., 1.21.4), as outdated Cicada builds register a developer cape layer that causes this exact crash.
  2. Update or remove any other player cosmetic, cape, skin-layer, or armor-rendering mods that were downloaded for Minecraft 1.21 or 1.21.1 instead of your exact 1.21.2+ game version.
  3. Check the `Fabric Mods` list near the bottom of the full crash report for mods showing older version tags, and if the culprit is still unclear, test in singleplayer by opening your inventory while disabling half of your mods at a time to isolate the outdated mod.
LoadersFabric, Quilt
SeverityStops the game
CategoryWrong Minecraft version

Check your own log

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