Failed link to Devialet Phantom

Hi. I have downloaded the trial version of Audirvana but my Devialet Phantoms (two in stereo) fail to show in the Devices dialog. I am running the new Devialet DOS 2 (2.8.5) operating system on the Phantoms. Audirvana is running on a 2019 iMac running the latest version of Catalina. I have checked that all devices are running on the same wifi network and I have restarted the Phantoms in case this was necessary for Audirvana to see them but unfortunately it doesn’t see them. Any advice would be appreciated?