Unable to access WP Dashboards in Multisite setup

I'm unable to access dashboards for sites other than my main site directory. The browser error reads "The page isn't redirecting properly" (see attached image).

How do I prevent this from happening in the one additional site I have and in those built going forward?

Domain: candcworldwide.com – I've opened support access if that is helpful.

Thank you again – support is great!