That is the error ID, what I’m looking for is a different help code that we use for technical support:
First click the Help link:
Then click this button on the popup:
It will generate a 32-digit code. Paste that here and we can try your case.
Also, the region/realm/name pickers on the support page are only for Battle for Azeroth right now. Usually if you provide a snapshot ID by following the steps above, or provide the error ID as you did, we can figure out which character it was for.
Using snapshot ID generated via the Help link next to each feature and posting it on the forum here is by far the fastest way to get help with any issue. (We should probably update the support page to tell people that, it’s a relatively new feature.)