Okay, I'm working on the security specialist superbadge challenge 2.  I've created a new trailhead playground for this challenge and am trying to download the security superbadge managed package, but I get "The package you attempted to install is a beta package, which you can only install in Sandbox or Developer Edition organizations."  I've spent hours trying to get this to work, but keep ending up at the same point.  I am following the "installing a package or app to complete a trailhead challenge" to a tee - at least I think I am.  I logged into an incognito browser window using my normal trailhead user name and password, but what is "normal" for name and password anyway.  Am I supposed to use my "normal" name and password or do I have to reset the password for my "playful-whatever" and use that? Anyway I'm stuck.   Downloading packages is the hardest part of this.

I don't know why, but Trailhead does not see that I've setup a user Samantha Cordero with the profile Field Sales User. I've create the Field Sales User profile, created the user Samantha Cordero, activate the user, generate a password, and logged in as the user. I even logged in as her in Salesforce 1, but I still get this message:

Here is what her user detail page:

Field Sales User profile: