Railclone Lite does not work?

[Sentropi]

I am a student who is trying to learn 3Ds Max. A few days ago I started to model my house for practice. I googled how to make roofs and found Creating Roofs with RailClone tutorial. I downloaded tutorial files to process with the video. But after choosing tile object, this happened:

https://imgur.com/a/b7EDVVX

I did the exact same thing in the tutorial but it didn't work.why?

[Rokas]

this is just "box"ed preview for faster viewport performance. Pleas try to render and it should look as expected. You can also change viewport display mode to "mesh"

[Sentropi]

this is just "box"ed preview for faster viewport performance. Pleas try to render and it should look as expected. You can also change viewport display mode to "mesh"

THANK YOU SO MUCH!