system extension blocked but no way to allow it
So i am trying to install bluestacks android emulator, and everything is fine until i get to about 90% finished in the first start up of the app. I get a message saying 'system extention blocked please go to security and privacy settings to allow the extension" so i go over to securrity and privacy settings and there is no message or button to allow the system extension. I have tried many different ways to get it to work but none of them work. Thanks
MacBook Pro 13″, macOS 11.0