When I choose “Add A New Book” from the “My Catalogue” menu at the top left, it brings me to the homepage of the site (no error). This is when I am logged in as admin, the link pointed to by “Add a New Book” is /wp-signup.php.
I have the .htaccess file as described when you install WP multisite, readable by www-data, in the top directory of the site.
Hi @ryanmartinneutrino, can you drop me an email at ned@pressbooks.com? I’d like to see if I can figure out what’s going on here as we can probably benefit from troubleshooting this to improve our installation documentation. Cheers.