What are you using … DeNoise or Photo AI? As you have posted here in Photo AI I assume you know that so FYI PSD is not supported so you cannot open as a standalone.
If you are opening in plugin mode from PS then OS passes a TIFF.
At this point I’ve tested more files of different sizes, etc. with photo AI that have the same issue, while the denoise product alone works great…Photo Ai does not. I could still be missing something with instructions though…so will dig in later this morning to see if I’m doing something wrong.
I am sure you are doing nothing wrong but if a Support person doesn’t reply within 2 days (they are in the US) please raise a support request at the main website.