It’s a known issue that we can’t fix. “Google Analytics” and some other plugins hijack the authorization workflow.
Please temporary deactivate “Google Analytics” and/or all other plugins (“Blog Promoter”, “WooCommerce Piwik”, “Tweet Old Post”, “Simple Facebook Connect”, “Evergreen Post Tweeter”, “Simple Twitter Connect” etc.. ) related to “Social Networking”, do all authorizations and then activate them back. Even some versions of Woocommerce could cause this.