System extension uninstall problem

Hi, I develop app with system extension. After installation i locked a bundle with sudo chflags -Rf schg command and everything worked. But after uninstall, my mac has strange behaviour. System preferences cannot open Security and privacy tab, only hang. I cannot run systemextensionsctl utility, in system.log i can see periodically crashing of sysextd daemon and i cannot remove any app from /Application folder. Is there any solution to fix this? Something to remove systemextension? Thank you