I get the same error code when looking at the Devices tab. I unplugged my Firestick and could see connected devices. As soon as I plug the Firestick back in error code 500 is back. Hopefully T Mobile can fix this.
Already have an account? Login
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.
Sorry, we're still checking this file's contents to make sure it's safe to download. Please try again in a few minutes.
Sorry, our virus scanner detected that this file isn't safe to download.