Import from vbulletin 4 - admin account not found

I am trying to import from vbulletin 4. when it gets to the admin authentication, it fails with the error: Sorry, no account could be found related to the email/username and password you entered. I have the correct username/password, so I'm not sure what's going on.
I have vanilla porter 2.0.3 and vanilla forums 2.1.5.
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Comments
Enter the email of the account you want to use, not the username. If you still get the error, just check "Use my current password" instead of entering one. Possibly there's a bug there.