When I import assets I keep getting error messages in my console. How to fix this?

I received error messages like "Can't import tangents and binormals, because mesh 'Wheel_rr' doesn't have any." and "Can't import tangents and binormals, because mesh 'ST_Veh_Van_Green_Z' doesn't have any."![alt text][1] [1]: /storage/temp/182983-error-message.jpg