some export operations were not performed

For everyone who gets this error message while exporting photos:

"Some export operations were not performed."

I found out that I can export normally when I delete my AI mask. Alternatively, if you disable AI lens blur, you can also export without issues.

Here's how I fixed my problem:

1. I changed the GPU settings in Lightroom from 'Automatic' to 'Custom'.
2. Then, I checked the option 'Use GPU for export'.

Hope this helps!