Remove the data file, suggest you download the addon on your end as its meant for serverside but overall the model should work.

downloaded the addon and shock modelpack but whenever i spawn in a jailer NPC its invisible and it keeps coming back after i mapreset or restart my server, anyway to fix this?

Would need to edit some of the lua relating to the NPC. Believe its in init.lua

Hi there, just wondering if there is a way just to make the Jailer/Bailer stand still instead of swaying.

It might do, I haven't tested it so no guarentees.

does this mod work in sandbox?