How Come Other Players Cannot See My Animations I Coded Onto NPCs?

I've created an NPC and coded a script (not a localscript) and whenever I press test or Team test, I can see the animation clearly while my friend does not see the animation on the NPC at all, why could this be happening? I put it on a dummy on the workspace, and inside that dummy, I inserted a script and inside that, I inserted the Animation ID. Down below is the code I am using but only I can see it, can anyone help me out with this? I am also very new to coding so Im sorry, it would be helpful to explain everything, thanks! btw nothing is in the serverscriptstorage, and if you know the answer, please describe it thoroughly, I'm very sorry but I ain't that smart at this

local animation = script:WaitForChild('Animation')

local humanoid = script.Parent:WaitForChild('Humanoid')

local dance = humanoid:LoadAnimation(animation)

dance:Play()