Bisel en importaciones dwg de diseños de textos

Hi I am trying to add a rounded bevel to word designs directly by selecting the face. I import them as dwg or dxf files and they are originally made with illustrator.
Funny how sometimes it won’t let me add bevel to the extruded face when I select the entire face, and yet if I do it by selecting individual lines from the corners of the face, it does.
But still, there are designs that there is no way to get it.
Also, a path tracing type tool would be nice that converts imported black and white images to Bezier curves in Sharp3d and maybe from shapes created at source in Sharp solves the problem, and can be extruded and added bevels no problem.

Before I used Sketchup and with a rounded corners filter that solved it for me.