pro sites / multisite and redirect loop

Hello
I have totally fresh install with Multisite. I
1. added Pro Site and Domain mapping as the only 2 plugins added and activate.
2. I can change domain maping on site one and it works fine
3. I created a new site from the administrator dashboard and all seems fine.
3a. I recived email notifications of new user with username and password
4. When I try to login to the new site dashboard so i can change settings and domain mapping, I get the following error.

This webpage has a redirect loop
The webpage at http://www.socialsupplychainnetwork.com/dscd/wp-admin/ has resulted in too many redirects. Clearing your cookies for this site or allowing third-party cookies may fix the problem. If not, it is possibly a server configuration issue and not a problem with your computer.

All other functions seem fine only happens when I hit dashboard.

I am trying to add around 20 sites that are part of our agency. Am I doing a step wrong with ProSites?

Louis