[Please describe your issue here. Try to include logs (Help → Logging) and add screenshots if necessary.]
Steps to reproduce issue:
Start Lightroom
Open a photo and use Plug in to bring up Photo AI (does not matter which type or through which menu item)
It comes back with system error or sometimes no action - Event log on Photo AI app (which I can start independently) says Cannot be used without QApplication
Topaz Photo AI [v1.x.x] on [Windows]