
This bug referenced here is happening in Photoshop 26.7.
As mentioned in that thread, the bug occurs with presets that were created and functioning in earlier verisons (26.6.1) and presets that were created and exported in the latest 26.7. Each import attempt results in the error message in red:
"There was a problem with your selected file, and the custom presets did not import."
Would love a workaround beyond dialing back to 26.6.1 or a general ETA on a bug fix update! TIA!