Any time I try to install Paragon NTFS for Mac 14, I get a "CFErrorDomainLaunchd error 9" message right after it asks for my password. The installer then quits.
I got this message a couple months ago, and since that time I've reinstalled the OS (for unrelated reasons), and I have no trouble with any other software.
I've even tried disabling System Integrity Protection as well as Gatekeeper, but it doesn't help.