Cinema receives KDMs so allow encrupted content to play. This KDM typically arrives via Email. And many use Gmail.
Gmail has announced the change in it’s authentication policy that will come into effect soon. This change may interrupt the flow of KDMs. This video explains what’s going on and how to avoid the potential loss of sessions due to this change. This change will affect automated KDM delivery systems and likely block them from working.
SEE Gmail announcement here: https://apps.google.com/supportwidget/articlehome?hl=en&article_url=https%3A%2F%2Fsupport.google.com%2Fa%2Fanswer%2F14114704%3Fhl%3Den&assistant_id=generic-unu&product_context=14114704&product_name=UnuFlow&trigger_context=a free
AutoKDM system found at: https://github.com/jamiegau/cinema-catcher-app