Workshop Player Model artefacts

Hello there,
Currently I have issues with artefacts on the playermodel when I import them in TU.
Might be a wrong setting in Blender or sth Im not able to see it in Blender.

That means you didn’t give weights to a vertex.

do you mean its caused by this thing (the only one that is left)

Im not very experienced with blender but everything else is exactly done as in the videotutorial provided from the sdk

Yeah you can’t have a ValveBiped bone at all.

I dont know what went wrong I redid the model a 3rd time and the forward thing is still in there but the artefact is now gone