Can't login after multisite upgrade

I’m trying to set up a wordpress server with multisite so I can host two sites with identical themes and plugins, http://www.abc.com and http://www.xyz.com.

I’ve configured multisite according to the manual and get to the point of
selecting subdirectory install and then modifying wp-config.php and .htaccess and then I can no longer login to the server (which is on my local network at 192.168.99.100).

My .htaccess file is:

———————————————————————–
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ – [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) $2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]
wpadmin@wpserver:/var/www/html$
——————————————————————-

I’ve added the following to wp-config.php

——————————————————————-
define(WP_ALLOW_MULTISITE, true);
define(‘MULTISITE’, true);
define(‘SUBDOMAIN_INSTALL’, false);
define(‘DOMAIN_CURRENT_SITE’, ‘192.168.99.100’);
define(‘PATH_CURRENT_SITE’, ‘/’);
define(‘SITE_ID_CURRENT_SITE’, 1);
define(‘BLOG_ID_CURRENT_SITE’, 1);

———————————————————————–

When I reverse these changes I can again login to the dashboard.

I have a single wordpress database, wg_wordpress.

The server right now is sitting on my private network at 192.168.99.100. In wp-config.php DB_NAME is set [login details redacted for security reasons].

What am I doing wrong?

Thanks