For those with either the Limited edition or the Season pass. As stupid a question as it is, have you all tried restarting your Xbox. I just tried that and I am now currently downloading the crimson map pack.
Xbox support says they are close to a fix but still have problems. I hope this helps and I am sorry to those that my suggestion doesn’t help. This is all a load of bull. If anyone should have access to DLC before anyone else it should be the people who paid for it in advance, not those who just bought it today.