Texture maping issue

hello, when i try to map texture with threejs it make the front face transparents and we can see inside the object

here is an exemple : https://themedium-ten.vercel.app/

on the left i put the texture directly with blender and it’s fine

on the right i put the texture in threejs and it’s transparent
Please how to solve it ?

Show code how you apply new texture / material pls hard to help without :pray::dolphin::cat2::heart::relieved:

Are the normals facing outwards correctly? (Open blend file + A + Tab + A + space / F3 to open search + “outside” + enter, then reexport)

OMG thanks you !!!
it was the face orientation
i flip it in blender and now it’s all good

Thank you

Sorry for my band english