A full browser screenshot would be more useful. Why would there be a redirect involved, how are you trying to access the site? Going to https://www.flickr.com/ works for me. see screenshot Just curious, what camera(s) do you shoot with?  ;-)

I have no idea why it would be redirecting, I am going directly to Flickr. Here is a full screen shot. Works fine on Edge, but my browser of choice is Firefox. Flickr support folks are looking at it as well, and haven't been able to re-create yet.

I shoot Canon 6d 90% of the time, mostly landscape stuff, but for action or wildlife I typically use the 7D with crop sensor.

Thanks for the screenshot. What OS? The error does mention cookies. Post a screenshot of your privacy settings. see screenshot Did you try with Firefox in Troubleshoot Mode?

Did you clear your browser cache? https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox

Problem was solved with the help of Flickr support. They provided a link directly to the login screen, and I was able to connect. Apparently www.flickr.com was trying to redirect me to the login screen for some reason. Clearing cache and cookies wouldn't resolve the problem, but as soon as I went to identity.flickr.com the problem cleared up. Strange, not sure what to attribute it to.