multisite sites not working right

Well, I offer this, get it working without any plugins and only the default theme first.

Retrace your steps setting up the network:
https://www.ads-software.com/support/topic/welcome-to-the-multisite-forum
https://codex.www.ads-software.com/Before_You_Create_A_Network
https://codex.www.ads-software.com/Create_A_Network

It looks like a redirect problrm.
What kind of multisite you are using?
From the url I see a sub-directory setting.
If it was an existing site that you are attempting to move on to a multisite installation, Then when you were updating to a multisite
you told to use the sub-domain type.
If that so the code that was supplied to you by the WordPress network setting contains define('SUBDOMAIN_INSTALL', true);
you can try to change it to false.
And you can also attempt to re-install WP with different table prefix,
if you want to use sub-directories and install multisite on the clean version of the tables.
Then migrate the database tables with the data of your site.

I checked the subdomain install line and it is set to false

this is the multisite coding that is in there now

/* Multisite */
define( 'WP_ALLOW_MULTISITE', true );
define('MULTISITE', true);
define('SUBDOMAIN_INSTALL', false);
define('DOMAIN_CURRENT_SITE', 'wasecaconnect.com');
define('PATH_CURRENT_SITE', '/');
define('SITE_ID_CURRENT_SITE', 1);
define('BLOG_ID_CURRENT_SITE', 1);

500 errors are usually .htaccess

What’s in yours?

It can also be a database conflict.

True, so check your error log! ??