I am so sorry about the inconvenience you are having with the Fox Sports Go App. Do you have issues logging in with any other devices? Make sure you are on the latest IOS and one thing worth trying is to uninstall and then reinstall the app.
Let us know how it goes.
If you encounter any issues with your service or equipment, I recommend checking out our Troubleshoot & Resolve solutions to help diagnose the issue.
*I am an AT&T employee and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.