Importing dwg why i get eror massage ?

[bagtoshop]

im trying to import this dwg to sketchup pro 2017 .
i get eror massage when trying to open the file as autocad 2018.
and its open if i save the file as autocad 2007/lt2007 but even in that why its not importing properly.
why ?
you can download it from here : https://ufile.io/0c6sv