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Nichole ParkerNichole Parker 

Logon to Developer Edition from a Challenge Issues

Unable to log on.

When attempting to log into the Developer Edition from a Challenge I'm getting an error message.

Challenge URL:
https://developer.salesforce.com/trailhead/force_com_admin_intermediate/point_click_business_logic/formula_fields

Error:
URL No Longer Exists
You have attempted to reach a URL that no longer exists on salesforce.com.

You may have reached this page after clicking on a direct link into the application. This direct link might be:
• A bookmark to a particular page, such as a report or view
• A link to a particular page in the Custom Links section of your Home Tab, or a Custom Link
• A link to a particular page in your email templates

If you reached this page through a bookmark, you are probably trying to access something that has moved. Please update your bookmark.

If you reached this page through any of the other direct links listed above, please notify your administrator to update the link.

Thank you again for your patience and assistance. And thanks for using salesforce.com!
JyothsnaJyothsna (Salesforce Developers) 
Hi Parker,

When you get the 'URL no longer exists' message, scroll to the top right - your name is shown (assuming you are logged into Trailhead).  Click your name and log out.  A login button is shown on the left in the popup window Login again and refresh your browser.

Hope this helps you!
Best Regards,
Jyothsna