'Error 55' means that the account the app is trying to access has expired. You can check your IceTV account status from the Account Details tab on the website after logging in.
If it is a free account or you have any questions about your account then please don't hesitate to contact us.
If you want to top-up your paid subscription you can click on the 1 month, 3 month or 12 month Top Up buttons at the top of the My Account page to top up your account using your credit card. Or for a discounted price you can enable or update Auto Renew