Audio quality and user's subscription in Mconnect

I recently downloaded Mconnect to play Tidal in UPNP on my Devialet speakers.

But Mconnect does not recognize my "subscription". It says : Requested quality is not allowed in user's subscription.

I've looked at the audio quality in Mconnect : there are only 2 choices (high or normal).But both give me the same trouble.

My Tidal subscription is a HIFI account and works properly in Tidal ...
Any idea how to solve this ?