We've received reports that some players on Xbox One are encountering issues when they try to access the Kurt Angle, Cena (Nuff), Accelerator, and MyPLAYER Kickstart downloadable content.
The good news is that we have a workaround: If you go to the Xbox Marketplace and manually download the DLC, you should be able to access it without a problem. Once you've found the piece of DLC you want to access in the store, you’ll just have to click on it and choose "Install."
Please make sure you quit out of WWE 2K18 before download and installation. Then restart the game after the process is complete.
We're currently investigating the problem and will hopefully have an update to report in the near future.