Bought multiple bus tickets and the app would not let me open and show them to the driver. The app even has a message that says "Sorry there is an error. Your payment has been processed but we can not display ticket. Please refresh your account later" so I tried refreshing it multiple times but the ticket would not display and I could not board the bus. I had to walk home. If this issue is known enough to have a message displayed for when it occurs then why wouldn't you just fix the error?