After installing Mac OS Big Sur, I had to upgrade PSE to v19. But since then this error message is regularily occurring after starting my Mac Mini (2018), even without starting PSE. I guess there still is a conflict between Big Sur and CreativeCloud, but I don't need CC and I don't want it yet. I am quite happy using PSE offline and I just want to get rid of that error message. Many thanks in advance for any support provided.