Have you found these problem/solutions for Auralic Aries?
I’m not familiar with the Aries, but it seems you need to set up RoonReady as a mode in the Lightning DS settings, and if using with a USB DAC, the DAC needs to be switched on. This seems to be a problematic area for several Auralic Aries users.
Note, I’m just a Roon User and Roon Technical people will help you with follow up and more comprehensive support.