Tidal only preview?

Here is a slightly different procedure for you to try:

  1. Go to your https://app.plex.tv/desktop#!/settings/online-media-sources account page and disable the Music/TIDAL provider
  2. On your https://plex.tv/users/other-services account page, unlink TIDAL, and then link it fresh
  3. Back on the Online Media Sources page, enable the Music/TIDAL provider again
  4. Wait 10 minutes for changes to propagate
  5. Restart (e.g. force-quit and launch) the player app