Not able to access subsite admin, shows error 'This webpage has a redirect loop'

I have just created a multisite with 1 subsite.
My website is mmsbahrain.com and subsite is http://www.mmsbahrain.com/vulture/

I can see the dashboard for my main website, but if I try to go to the dashboard of my subsite, it errors out.
the error it displays is

This webpage has a redirect loop
ERR_TOO_MANY_REDIRECTS

Pls advise how I can solve this