AI De Noise Error with older RAW files?

[Gavin Dougan Photography]

I have been using AI De Noise with high ISO images recently and it works great. I tried to apply this with older files from 2020 shot with the same camera (RAW) and it says an error happened? I have tried several of these files, none work, same error message. Any ideas? Very frustrating!

[JohanElzenga]

If you get an error message, then it may be a good idea to tell us what that message says, or post a screenshot of it...

[Keith Reeder]

It also wouldn't be a terrible idea for you to clue us in to the actual camera and - in particular - the file format in question: is it sRAW or mRAW, by any chance?

(I'll assume it is...)