Probleme when uploading animation

get problem when trying to upload an animation which work in blender and fbx viewer
https://ahp.li/f072955fe258ecb00df0.mp4
when i use the blender exporter i get error 30
when i upload in fbx it works but i get this ugly line from the head( but with wireframe

and this !!!
https://sketchfab.com/3d-models/test-conan-1-41d97b598cfd4446972aabed25242f66

it works well in blender and fbx viewer

if i could have some help

ok i have localized the problem it come front he head of my character( i put a square head the problem disapeard) :grinning:
next step find where in the head

ok find it it was bade topology :slightly_smiling_face:

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