Supposedly they are aware of the issue after looking over a couple other threads, but they have been working on it for over 12 hours now with little to no progress that I can see. There are apologies and tips for trying to get around this issue depending on which system you are on, but right now you pretty much have to be lucky to get back in.

Currently playing on the PS4 with a downloaded version of HW, and despite being told to download the add-on that is in the "related items" for it in PSN the expansion still refuses to work for me even though it has worked for others. PS3/4 users apparently were not offered a second code for the downloaded version and instead the Add-On is their equivalent.