Whenever I try to connect to Tumblr., I get the redirect to the Allow/Deny App screen from Tumblr, but there is a failure in the communication back to my site, and it generates an “Unspecified Error. #6” message when it does the callback to http://waynecochran.net. All of the other social logins I am using work correctly (Twitter, Facebook, Windows Live, Yahoo, LinkedIn, MySpace, etc.), is there anything special I need to do when building the App in Tumblr.? Here are my current settings in Tumblr. I have the application name the same as my URL, and I have the App Store URL and Google Play Store URL blank, so I don’t know if any of those three things could cause issues or not. I do have an icon loaded, as I know at least one of the other social network sites required one.