Anthem Demo Issues

VG247 reports on the issues many players are experiencing trying to access the VIP demo for Anthem, BioWare's upcoming mech action/RPG. EA Help offers this tweet and this one to explain what they're doing about it:
We're adding more server capacity to the #Anthem demo right now. Hang tight while we work to get everyone into the game.

We're looking into the infinite loading issue with the #AnthemGame demo. In the meantime, try relaunching the game and rejoining your mission to see if that helps you.