Unable to access site after importing DB I am installing a repo locally, and everything runs smoothly and I am able to see the site and login to my admin. But when I import my DB then visit my site: I get the error message "Site unavailable". 

When I visit my admin area I see the message: "To complete the update, some changes must be made to your database." I click proceed and see the message "Craft couldn’t backup the database. How would you like to proceed?".

I am using Craft 3. But the DB I am importing from uses the older 'craft_' prefix, which I defined in the setup. Am stumped on how to solve this.
Ended up getting this resolved, by downloading DB from Craft staging site and importing, instead of using Sequel Pro. Also make sure your configs in general.php are correct.