As I mentioned a few posts back, there have been recurring issues with Topaz products working with Capture One. It seems they have a recurring issue of breaking it, and then fixing it, with different releases.
I round trip to Photoshop from C1 and run Denoise from PS, so I haven't kept track of the current status. But the release notes for the latest version of Sharpen AI said they had fixed a C1 round tripping issue. If no one can help here, its probably worth looking at the Topaz help forum, or asking Topaz directly.