Cannot Put Period in User Name

Are you making them from the front end or the wp-admin back end? You SHOULD be able to override it from wp-admin.

Not sure what you mean by front end and back end. I am logged into the network as a super admin using url/login

How do I get in as wp-admin and override as you put it?

Visit yourdomain.com/wp-admin/network/

add a user from that page.

The ‘front’ end of your site would be domain.com/wp-signup.php ??

I use https://www.website.org/login to login. Is that taking me to the “front end”?

That you don’t know the difference between the front and back ends of WordPress is a little worrying, because this is one of the simpler points of WordPress.

Front end: What non logged in users see. Your ‘site’

Backend: The dashboard. What logged in users can access. Has all your site settings. Posts are written here etc.

So long as you’re adding users from a URL with wp-admin in it, you’re on the BACK end of WordPress

Okay. I now understand front-end and back-end. Whenever I log into my site, using https://www.site.org/login I AM in the back-end, by your definition. Hence, it would not be possible to add users unless I was logged in and thus in the back-end. When I use https://www.site.org/login, it redirects me to https://www.site.org/wp-login.php. Once credentials are entered, I end up at https://www.site.org/wp-admin/.

I am perplexed as to why I am having issues with this multisite and not my other multisite, which runs on the same server. Both use the same theme (twenty-twelve child) and same theme files.

I’m going to ask this differently, so please bear with me.

What URL are you one when you try to add a user?