I am attempting to update my Parallels Desktop on Mac, and am stuck. See screen:

Instructions are to open Security Preferences and allow "Parallels International GmbH" but I am unable to do so. Please help get this resolved. Do not even know how to revert to old version to get it working, I am stuck.
Instructions are to open Security Preferences and allow "Parallels International GmbH" but I am unable to do so. Please help get this resolved. Do not even know how to revert to old version to get it working, I am stuck.
