Mesh splitting help

Alright so for the past 2 days, I’ve been trying to import this armour I made in Blender.

I keep getting the same error, I can import everything else, except this armour.

This is the armour

This is the face orientation

Everything is good

but this is the error I get

And I don’t know how to fix it. Each piece of the armour is under 10k tris, every normal is good, I’ve correctly UV unwrapped it, geometry is clean, everything. I don’t know what to do.

For me, re-naming the mesh fixes importing problems sometimes. For some reason, Roblox won’t let you import the mesh if the name is Rock, but it will if you name it Rock (Extra Text Here so the model goes through) – Just an example. But you could also try to re-export the mesh, and or open a different place on Roblox. These also sometimes fix these kinds of issues for me.