When you try to open a raw file saved on a network-attached storage or an external storage, Photoshop displays the error: Could not complete your request because the file was not found.
This issue occurs in the following scenarios:
Adobe Camera Raw 11.2
When opening images from Lightroom
Roll back to Adobe Camera Raw version 11.1. The installer link can be found here: Camera Raw 11.1 installer (macOS)
When opening raw images from Photoshop
Select multiple images instead of a single image.
When opening raw images from Bridge
Do any of the following: