Problem whit rigging

So I just import my blender file into unity. Then when i tried to rig the body happen what you can see in the folow image.
Something is in the place of the legs. I dont lnow if this is problem of the blender or the unity.
Can anybody help me ?

That happen to me, the problem that I had was Extra privets laying free on my blender image. But check if all the bones are in the correct space for the rig.