Thanks for your help troubleshooting this @Regnad! Glad you’re up and running.
For the benefit of others, if you’re having trouble logging into TIDAL when using Roon on OSX, you may want to start by deleting the cache located here:
/Users/[your user name]/Library/Roon/Cache
Once you’ve deleted the cache, restart Roon and try logging in again. Let us know how it goes folks, and sorry for the inconvenience – looking into the cause of this now.