I'm using Drupal 7 with the Domain Access module version 7.x-311. I've successfully configured a bunch of subdomains running sites correctly, with one subdomain as default.
All worked well until I swapped out the default domain with a new one. Now, every login attempt for admin including user 1 hits an 'access denied'.
I've updated the domain access settings to set the new domain as default. I've also ensured that the default domain is not set in the settings.php file, plus set the domain cookies settings reflects the top-level domain.
I've also cleared cache and cleared browser cache and cookies, still I get an access denied. I cannot work it out.
Has anyone got advice on where to look next?