Tidal Disappearing

Twice over the last few days I have booted Volumio (Pi + Allo Boss) and Tidal hasn’t been there as an option. There is no option, that I can see to put in the Tidal username/password or am I missing something.

After much faffing about I got it back last time but do not know how. But it has happened again.

Strange thing is I can playback racks from Tidal that are in my last 100 list or in the queue.

Rebooted and it is back, why?