“Doesn't exist”, “not authorized”, or “failed to join” — what to do?

Match the message

Each error points at a different cause, so match yours before retrying.

• Need to log in: sign in with the account that made the booking, then rejoin.
• Doesn't exist or ended: the session window closed or was cancelled — check My Bookings for the current status.
• Not authorized: you are signed in as a different user, or the booking belongs to another account or organisation seat.
• Failed to join: usually network or permissions — refresh, allow camera/mic, and try a supported browser.