Communication with RekordboxAgent failed (MAC)

"ERROR

Communication with RekordboxAgent failed. For details, Follow the link below and refer to the FAQ"

Thats the pop up get when I try to launch Rekordbox. I have restarted the mac and all the programs that the link tells me to close are closed, but I still get the pop up. I then tried to upgrade, and then it opened - but closing the program again and reopen it, it continues to give me that same error.

Link: https://rekordbox.com/en/support/faq/trouble-shooting-6/#faq-q600139