Log in fails with multisite code

Well, I tried to create a network tonight and something is just not right. I got the network setup link, accessed and added the code to add to the wp-config.php and .htaccess files and got the network admin link in the dropdown menu just fine. But when I tried to make a new site, it looked like I had new subdomains instead of the subdirectories I wanted. The system was asking for a “xxxxx.ychumanities.net” format, rather than “ychumanities.net/xxxxx.” I guess I had the subdomain option selected rather than the subdirectories?

In any case, I took the code out again and started fresh. No problem adding

define('WP_ALLOW_MULTISITE', true);

to get the network set up link but now, when I add the second bit of code to the wp-config.php file, my log-in is disabled. I know I am inputting the correct username and password, but when I hit enter, nothing happens. No wrong password error, no wiggly text, nothing. I just get the log in page. When I take out the code in the wp_config.php file, I can log in fine. I even tried uninstalling and reinstalling WordPress altogether, but still no dice. As soon as I add

define( 'MULTISITE', true );
define( 'SUBDOMAIN_INSTALL', false );
$base = '/';
define( 'DOMAIN_CURRENT_SITE', 'ychumanities.net' );
define( 'PATH_CURRENT_SITE', '/' );
define( 'SITE_ID_CURRENT_SITE', 1 );
define( 'BLOG_ID_CURRENT_SITE', 1 );

I can no longer log into my dashboard.