You may want to try closing your session window and try again. My 1st login attempt had an error but I was able to get in afterwards. I've been logged in for awhile now and have entered a shop already and am still logged in now.
Another thing I noticed about the SCM site, after I submit a report and select the option to go back to Shopper's Corner, I get sent to the main home page and have to login again. Annoying quirk that wasn't there before.