Appointment Scheduler Package ID #

I am attempting to start and complete the Set Up Salesforce Scheduler hands-on challenge through Trailhead. I am in the first module: Set Up Salesforce Scheduler.  I have followed all instructions and set up and properly connected the Developer Edition Org; however, I get the error:

"We can't find the special Developer Edition org that contains Salesforce Scheduler and our sample data. Make sure that the org selected in the Hands-On Challenge picklist is the Developer Edition org that you created for this project." 

There is no package ID for me to install the  Salesforce Scheduler and our sample data and if I try to use the links from the module, it says I cannot use the email address because I already have an account.  HELP PLEASE!