Maybe related to a Windows update, my fireface 800 doesn't take the sample rate from SPDIF any more when it is turned on.
The fireface settings window tells me sample rate 32000 Hz with red color. Clock Source is SPDIF (Line6 Helix). Input Status: SPDIF = Sync 44100 Hz.

Sonarworks Reference 4 plugin tells me that it cannot start the (ASIO Fireface) audio engine.

I can manually set the sample rate to 44100 Hz in the fireface settings and then everything works, but why do I have to do this?