I’m running the latest version of Catalina and Ableton Live 10.0.1. The image should show the issue.
I see you are loading C1 as an Audio Unit plugin.
Waves plugins are qualified and supported in Ableton live in the VSR3 format, and not in AUdio Units, as you are experiencing.
Check out this page and follow the instructions in Step #2 to load our plugins as VST.
Brilliant! Thank you.