We are sorry to hear you are experiencing an issue with Dish Network.
As of 4/3, the outage which began on 2/24 has been resolved. You may wish to delete and reinstall the app, log in while connected to cellular data, or clear the browser cache and restart your computer, before attempting to log in again.
Please view their website or contact their support team for further assistance. If you are still unable to log in, Dish Network will need to check and update your account entitlement.