I have 2 Mac's both 2015's. The only way I found to solve the crash is to install Catalina via a bootable USB. Once I restored from Time Machine the crashes came back. One of them doesn't have Norton, the other does, but both would crash out of the blue. It was pain, but I copied all my files off, installed Catalina from scratch, reinstalled my apps, copied my documents back over and no crashes, not even the Norton installed one crashes. I have a feeling the upgrade has issues, not sure if they are security related, or files not updating, but hopefully they will fix it on the next round.