Microsoft is currently reporting issues with Xbox Live. It states that, "Having a tough time downloading Guacamelee! Super Turbo Championship? We want you to know we are aware of the issue and working hard to find a fix. We appreciate your patience in the meantime. We'll update you on our progress as soon as we have more information."
However, Try this link and see if it works: https://store.xbox.com/en-ca/Xbox-One/Games/Guacamelee-Super-Turbo-Championship-Edition/3f8ed5c9-36af-4ffb-9f4d-dcf0c38a9232
"When you work with your hands you'll never be rich but you'll never go hungry." ~ SR3