When you see a red circle with a white exclamation mark inside it in the Orchid client app, that indicates that you need to add more xDai to your Orchid account becauase you currently do not have enough xDai to cover the cost of redeeming a ticket.
You can use the Orchid VPN client app to make another in-app purchase, which will add more xDai to your Orchid account. This xDai will automatically be divided between the Balance and Deposit buckets, allowing you to continue using Orchid!