Hi, thanks you for good mod.
Villager type and profession texture not work on server.
At the same time Zombie Villager works as needed.

p.s.
I saw
Note 2: This mod is required both on the client and the server side to work as intended.
But my server is Paper. And if the Zombie Villagers are working, then maybe the Villagers can be fixed.

Unfortunately, it's impossible to have the mod work without the serverside part implemented. This is because each villager has a variant of their eyes and skin, which the server tracks. Zombie villagers don't have this tracking needed but will if you zombify a villager. I'd recommend getting a new server with fabric on it, possibly using something like Aternos.

Ok. I'll try it then - adjust the internal texturepack to make it work through random textures, like in optifine.