TM FX 1.74 had just been released in Mac USB driver 3.26 and others. Unfortunately we overlooked a bug with the Digiface AVB and Digiface Dante: routing to the hardware outputs is disabled, so no sound on playback. New driver packages including TM FX 1.75 should be available quickly. Until then you can exchange the app manually with this download:

https://www.rme-audio.de/downloads/tmfx_mac_175.zip

https://www.rme-audio.de/downloads/tmfx_win_175.zip