After SAML authentication, users are being prompted for Salesforce login credentials when they click on a custom button that launches a VisualForce page (It now opens a new tab and asks for Salesforce login information). This just started happening on September 1st, previous to that, it was working without issue and the only changes recently made in the org were to page layouts. Users are not prompted any other time as they navigate through the org.

After SAML authentication, users are being prompted for Salesforce login credentials when they click on a custom button that launches a VisualForce page (It now opens a new tab and asks for Salesforce login information). This just started happening on September 1st, previous to that, it was working without issue and the only changes recently made in the org were to page layouts. Users are not prompted any other time as they navigate through the org.

Hi! 

I'm going through the Trailhead quizzes, and I've come to the ones that say "Connect to your Developer Edition" in order to complete the quiz.  I have a Developer Edition account set up, but when I try to access it through Trailhead it gives me this message: "Houston, we have a problem... you are attempting to log into Trailhead to complete challenges with an org that isn't supported.  When you are completing Trailhead hands-on challenges, you cannot use a production or sandbox org...." Anways, I'm not sure how to complete the quizzes. (They are under Learn CRM Essentials)  Any insight is greatly appreciated!