Static props don't have animations, even if it's mandatory to have at least one

I guess some vertices still not weighted to head bone

man apply some material, it's hard to say with these pink chess
something simple would enough for vmt

VertexLitGeneric
{
}

Dmx path should not contain cyrillics

Try Noesis

I used to restart blender after installing

decompile
add new sequence
compile back

Just upload release to github -_-

You might not have vertex weights for mesh

Studiomdl optimizes unused bones if they are not animated or don't have $definebone line or they don't have attachment attached to it