Blockbuster and servers

I was making a Minecraft roleplay using an Aternos server 1.12.2 and using the mod blockbuster by McHorse. I could see my models but the other person couldn't see mine. I went into the config folder on the server and it said I couldn't upload the files.

an .obj or some sort of file like that. because with Blockbuster you can add 3D models and when I downloaded the mod blockbuster on the server there was a config folder for the mod but no option to add obj files or any file you would need to add a 3D model

you can either get the models from McHorses discord server or get them from the internet

to the discord server?

I don't have a link to an obj file because you would have to download it