hello!
hook OnHorseHitch not working, plz, check it

How are you using it and what isn't working about it?

need change second argument to
object OnHorseHitch(RidableHorse horse, HitchTrough.HitchSpot hitchSpot)
{
Puts("OnHorseHitch works!");
return null;
}

old value has been (RidableHorse horse, HitchTrough hitch)
as in uMod -> Docs

hmm.. I don't remember information about this changement

Change from 2020, though unsure about the arg change intension: 

Fix OnHorseHitch not being able to fully return · OxideMod/Oxide.Rust@c35a435 (github.com)