Have you tried restarting your router/core/mac this is always worth trying and may resolve the issue or point you in the right direction to finding a resolution.
Hi Dylan, sorry for the late reply, I am abroad and could only try to solve the issue via remote access of my Mac mini running ROON!
however I was able to delete the tidal_account file
It was located in the library folder of my user account
After restating ROON, the audio devices were visible again!
So thank you very much, problem solved!