- I copied a site using Duplicator plugin, then upgraded

Hi - I copied a site using Duplicator plugin, then upgraded from 3.8.13 to 4.4.2, now can't log in. Need help figuring out what's happening. Happy to pay someone to fix this. Tried posting this a a job but am not seeing my post.

Note: The Site Admin link on the duplicated (test) site also points back to production and I can't find where that's hardcoded either.