Subsites not being created on new multisite installation

My primary domain is working fine after a new install of multisite, but the subsites give an error message when trying to view in the browser. I also can not get to their dashboards.

“This site can’t be reached

s1.wp-class.com’s server DNS address could not be found.”

One mistake I made when setting up the multisite was I forgot to add the wildcard for the domain first (*.wp-class), so I went back later and added it after adding the code to the wp-con.php and .htaccess files.

Maybe I need to start all over? Please take a look. I have granted access.

Site: wp-class.com, s1.wp-class.com, s2.wp-class.com

Thanks, Joe.