I have a file called deGuardianElmeti_snds.mods.xml
It turns out that this unit doesn’t have a snds file ind the sound.bar
<protounit mergeMode='replace' name="deGuardianElmeti">
I removed the .mods extension in the file and now it works.
I thought that this may be of use for people
I’m lying. I was actually writing a post to ask for help and during writing I made it work.