Problem logging into my wordpress admin

I have challenge logging into my wordpress admin area after installing ssl certificate from cloudflare. Instead of displaying the admin page, this is what i get on the screen below:

The page isn’t redirecting properly
Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
This problem can sometimes be caused by disabling or refusing to accept cookies.
I have cleared all my browser cookies and cache, but to no avail. How would you assist me to fix it? Please I need your help.?