You have installed CADWorx Structure, but no menus or ribbons appear and no Structure commands work.
Run CADWorx Structure and open the AutoCAD OPTIONS command
Check to see if the Structure paths are showing in your Support File Search Path. You should see the following paths at the top of the list as shown below:
C:\CADWorx 2017 R1\Structure\support
C:\CADWorx 2017 R1\Structure\blocks
C:\CADWorx 2017 R1\Structure\borders
Also ensure C:\CADWorx 2017 R1\Structure\support is added to the Trusted locations
The directories shown above correspond to my install location of CADWorx Structure. If you installed into a different location, ensure you use your paths instead.
You must install CADWorx Structure with full admin rights.
CADWorx Structure 2017