So I just made my new TP, found the settings to rename it. clicked on the Launch your hands-on org after making sure it was the default hands on org and I get an error:
This site can’t be reached
cunning-raccoon-380385-dev-ed.lightning.force.com’s server DNS address could not be found.

I have my normal DE org connected as well and it takes me to the login page for that org where I can log in successfully. Not sure what I'm missing?
Any help is appreciated, Thanks!

I'm working through the "Render and Preview the Contact List" lesson of the 'Quick Start: Lightning Components" Module in Trailhead. I get the error message "The 'MyContactListApp' app does not contain the 'MyContactList' component" when I attempt to add the "MyContactListApp" This message shows up as well: "The Lightning Bundle name 'MyContactListApp' is already defined. Please choose a different name." How do I find it? I must have created it??? it is not in the dev tabs but mycontact...cmp, .svg everything but is listed. I need it to add the following code: "<c:MyContactList /> ". I'm super green in this area and have no idea how to work this problem. Any help is much appreciated! Many thanks! Larry