This is happening to me still. I'm running 11.2.3 (20D91) . It started with Little Snitch, I believe. It attempted to install a kext but was not able to. From then on, I got kernel panics in the first few seconds of booting up. I learned that I could permit the kext through terminal and I did so, which fixed the kernel panic. After doing this, though, I have found that the Security & Privacy pane crashes System Preferences. My error log appears to be too big to paste in an attachment here. Can anyone help me? Really trying to avoid a complete wipe and reinstall, as I have TONS of preferences set for various apps stored deep in Application Support & preference folders that will not survive that.