The Fabric version of the Halo HUD and other dependencies look to be working fine.

Dependencies installed, but still says not installed

In a 1.21 NeoForge instance, when launching the game after installing Halo HUD and YACL, the game displays an error. :(

halohud-4.3+1.21-neoforge.jar
YetAnotherConfigLib-3.5.0+1.21-neoforge.jar

I noticed that the missing dependencies for the game prompts were different than for YACL itself.

The current modId used by the new YACL is yet_another_config_lib_v3 instead of yet_another_config_lib.

The game crashes

I tried manually modifying the neoforge.mods.toml file inside the Halo HUD jar file.

- modId = "yet_another_config_lib"
+ modId = "yet_another_config_lib_v3"

I thought I could enter the game without any problems, but it still does not work. It seems there is another problem.

Crash log (Deleted)

Thank you for the detailed report! Good catch on the YACL id.

I have pushed a new version that should work properly!