How to replicate: Hold a golden apple
I don't know much info about it besides "i am holding a golden apple", but i hope this error log helps

What version of Minecraft? What version of AppleSkin? My guess is that you need to update your AppleSkin to better match the version of Minecraft you're using.

i was using minecraft version 1.19.4 and the file name of the mod is "appleskin-fabric-mc1.19-2.4.1.jar" so it assume its version is 2.4.1

or it may be related instead to something on the server that I was playing on, I just tested it on a singleplayer world (same mods as yesterday) to record a video and it didn't crash.
i guess this is why i shouldn't file bug reports at midnight, this should be closed.

For 1.19.4 you need appleskin-fabric-mc1.19.4-2.4.3.jar