I'm getting "Could not complete your request because of a program error" when I try to apply or edit blending effects & styles. I can apply saved ones, but can not edit them or create new ones. I was getting the error the other day on the previous version so I updated to v24.0 this morning & restarted computer but am still getting this error. I'm running on a late 2015 iMac on macOS Monterey 12.5.1.
I ran a user diagnostic, that info is in the attached pic. Any suggestions?
How much free space do you have on your hard drive? And how much RAM is on your machine?
Please go to Edit > Preferences > Performance section and uncheck the option "Use Graphics Processor." Restart your Adobe Photoshop and see whether it helps. If the issue persists, check out the other solutions.
You may try to reset Photoshop preferences back to defaults and check if that helps.