Morph mod crashes when pressing [ key. Crash log is added.

[MinecraftManah]

Crash log:
crash-2023-11-12_22.41.04-client.txt

What I used:
Launcher: Prism Launcher
Instance: Forge 1.16.5 version 36.2.39
Pixelmon 1.16.5 version 9.1.9
Morph 1.16.5 version 10.2.1
iChunUtil 1.16.5 version 10.7.0

Additional details:
Optifine isn't installed
The mod combination should be able to work as shown here: https://www.youtube.com/watch?app=desktop&v=3EhlJk_oL3g
That video was posted on Dec 3, 2021 if that helps with mod versions.