My Imported Sketchfab Monster Rig Won’t Move or Fall in Roblox

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Hey everyone,
I’m working on a horror game in Roblox and imported a monster model from Sketchfab. It’s fully rigged (with bones), and I brought it in through Blender as an FBX. The model shows up fine in Studio, but here’s the weird part:

It doesn’t move or fall.
It just floats there in the air like it’s stuck. It’s not anchored, and it doesn’t respond to gravity or animations. I’ve been trying to get it to act like a NPC or something, but it’s completely still.

Here’s what I’ve already checked:

All parts are unanchored
I added a Humanoid and AnimationController
I made sure everything is welded and joined properly
Animations don’t play at all

Smily horror monster - Download Free 3D model by Bento (@gostbento) [3d3fc31] - Sketchfab this is the rig im using

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Do you have all the correct body parts? Such as a HumanoidRootPart, but that wont explain why the model is floating unaffected by anything which sounds too weird to be an issue caused by you

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Yes, i have a HumanoidRootPart. I also tried manually move it and i made the humanoid R6 and made the models primary-part the HumanoidRootPart it still doesn’t work… I clearly don’t know why the body is just still standing, i did add print() to see if it gives me the coordinates where he went or touched the parts, it still didn’t work.