I have to do a lot of testing using CSR8510 chipset Bluetooth LE dongles. Since upgrading to Catalina I am getting this error when I connect a dongle: "Unable to connect "Cambridge Silicon Radio - Bluetooth Dongle (HCI mode)" to "[machine name]" now. Try and connect this USB device later. Help me solve this problem" The link to 'Help me sole this problem' has no useful information. Is there a work-round?