Hi Jeff C,
Thank you for writing us. I might be able to point you in the right direction. Please take a moment to answer the following:

Is this subdomain or subfolder mode? If subdomain did you create your aliases?
Did you rebuild your .htaccess and associated wp-config settings? These settings might have platform specific paths and differ from system to system (hosting providers seldom run Mac or Windows). Check WordPress’ suggested settings for Network Setup (see attachment).

If under the subdomain option, you may need to follow the section “Create Subdomains” at https://serverpress.com/doc/getting-started-wordpress-multisite/