I believe there is a problem with the armature you are using. It could be how it is parented to the mesh. Not sure yet. I was able to export your mesh fine with another armature (not fully rigged just a place holder) and it didn’t crash. I used the rigify armature to test it and it worked. I noticed there is a small dot indicating the origin is not at the root bone on your armature. You may have to try redoing your armature.