Photographs showing up as all-white rectangles
As a Photoshop user for nearly 20 years, I am suddenly having a problem with photographs showing up as all-white when I open them, even though the Navigator shows the correct photograph. I just did an update to Photoshop CC 2018 on my Mac OS 10.11.6 El Capitan, but that didn't fix the problem. I am under a time deadline and need help. Thank you.

