Local installation of Multisite redirect problems

I’m having a hard time importing and configuring a multisite WordPress install to Local. After changing all database settings and wp-config.php, the site redirects to the signup URL. If I add define( 'NOBLOGREDIRECT', '');, there’s a redirect loop. If I add define( 'NOBLOGREDIRECT', false);, there’s a database connection error.

Feel like I’ve tried just about everything.