Launch Photo AI as a plug-in from Lightroom Classic 12.5 (File → Plug-in Extras → Process with Topaz Photo AI).
Let the Autopilot complete.
The progress indicator will never get beyond what’s shown in the attached screenshot. This also seems to occur when opening a file directly from Photo AI.
I’ve tried with CR2 files from multiple Canon bodies, DNGs, and TIFs. It happens regardless. I’ve also uninstalled/reinstalled Photo AI and rebooted the PC.