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Jennifer GeibJennifer Geib 

Error id: QVWBQHAG

 Tried it mutiple times in my trailhead sandbox and 2 dev sites (1 created last week and 1 created today).  This is in:

Prepare Your Salesforce Org for Users 
Create a Unique Account List View

  Newest error is:  

Step not yet complete in jen.xxxxxxxx@localflavor.som
There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: RJCBNGZR
AbhishekAbhishek (Salesforce Developers) 
Hi,

For all the Trailhead issues please report it here,

https://trailhead.salesforce.com/help?support=home#

https://trailhead.salesforce.com/help

So that our trailhead support engineers will look into it and get back to you.

I hope you find the above solution helpful. If it does, please mark as Best Answer to help others too.

Regards,
​​​​​​​Salesforce Support.