Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Start the game
2. See error

Expected behavior
For it to load correctly

Screenshots
If applicable, add screenshots to help explain your problem.

Context (please complete the following information):

• Minecraft version: 1.21.1
• Fabric Loader: 0.16.6
• Capes version: 1.5.4
• Mod List: https://pastebin.com/iBtKywt2

Additional context
Add any other context about the problem here.

send the crash log

actually this should be fixed in fabric loader 0.16.7, seems like 0.16.6 was missing ClassLoader.registerAsParallelCapable with MixinExtras