#Why do I see DataStore/MessagingService warnings in Studio?

Roblox blocks DataStore and MessagingService calls in Studio unless you turn on Home → Game Settings → Security → "Enable Studio Access to API Services." Without it, saved profiles, leaderboards, and the admin console's live-code/broadcast features log a warning and quietly keep working in a degraded, this-session-only mode instead of erroring. This is Studio-only behaviour — once the place is published and running as a real game, these all work normally without you doing anything else. See Installation.