Ah, presumably the yacl update broke things.

Pushed DynamicCrosshair 7.1 to fix this, should be compatible with latest yacl again :)

It seems like a difficult problem :(

What happened
Unable to load the configuration screen for 'dynamiccrosshair'
Please report to 'dynamiccrosshair' instead of Mod Menu
Java. langNoClassDefFoundError: dev/isxander/yacl3/gui/image/ImageRender

setup
MinecraftVerison:1.20.1
Modloader:Fabric 0.14.21 + Fabric API 0.88.1
ModVerison:v7.1+1.20

Screenshot