Unable to login to DIRECTV mobile app - DirecTV

We signed up for Direct TV recently & everything was installed today. We have been enjoying the TV all afternoon & evening so it is definitely hooked up & working.
We have different devices that we have downloaded the app onto. We can use my email account as a username & the password we choose to login to the website just fine. But when we try to login to the apps we get: "Error External System Failure"

Any suggestions??

This question, "Unable to login to DIRECTV mobile app," is about DirecTV channels, programming, equipment, and sports.