Hi @Marc_Van_Audenrode,
Have you try reboot the Roon Core, this often helps with Tidal login issues.
If that does not work try removing the Tidal account from Roon and add it back in.
As Carl suggested above, often times a reboot of the Core machine will resolve this type of issue. Can you give this a try and let us know if it helps?
So we can better understand what happened, can you elaborate on what exactly occurred? Were you logged in to TIDAL in Roon previously? When you started ROon up today was it just logged out automatically? Was there any change in your TIDAL subscription or account recently?
I logged out because nothing was available when I went to TIDAL in ROON, So I thought to log out and in again to solve the problem. But that was a mistake. Maybe I had to wait longer?