Snapshot ID 97651e04a8574a2aa8c195953c8e6cff
I’m bringing a new alt through the Dornagal intro - got this error during the initial landing/fighting on the coast.
Aside from Talents needing some tweaking, are you running the latest build of the add-on…?
It worked normally a little later in the evening - maybe just a funny interaction with the expansion intro? Yes, updated via CurseForge that morning.
Lol @ talent snark - leveling goes faster than I can be bothered to look for a build. All fixed by the end of the play session, though. 
I believe that during the intro a character can be in a state where it doesn’t actually have a spec active yet, and sometimes that causes issues on our site. As you found, getting through the intro and getting a real spec activated resolves it.
It wasn’t ‘dig’, just an observation - I noticed there were Talent points to spend, compared to previous Import; I clicked on “Use Last Imported” & the build you were on populated… I think I still got an error from that Snapshot, but wanted to make sure the site was working with the most up to date data available to it.