Hi, thanks a lot. I have M1 Macbook Pro , Mac os Sequoia 15.1.1 (24B91). If wanna aplly effect on any layer is sending this message. I was working properly in previos version of AE 2020. But i was force to update and now is not responding:( thanks a lot for your time.
IF you go to Settings>Privacy & Security do you see an option to allow for PixMap to run? It might be blocking it due to it being an "unknown developer".