Material Error While Uploading Models On Sketchfab

I was trying to Upload A Model in sketchfab which was originally Modelled in 3ds Max, then imported in blender for texturing. After completing the process when i tried to upload the model in Sketchfab it gives some sort of material. I cant Figure Out whats wrong with the model cause all it says is “Upload Failed material Error”. i Tried Uploading the model in different segments Still got the same issue. Tried Uploading Glb/Gltf and .blend File. File size is also 100mb and it is previewed perfectly in Glb Viewer. So i have no idea what is going wrong, i will be very Thankful if anyone can helo me solve this problem so that i can upload the model without any error.Thank you so Much