Sometime Salesforce Trailhead Challenge requirement and actual solution doesn’t go hand in hand. And seems many others also face same issue , Thats why I would be making notes on how I fixed Trailhead challenge issue.
Note : I would not be sharing solutions of Trailhead challenge , I will post fix only when there is discrepancy in what’s being asked and what worked.
Solution to this challenge would not work if you have Person Account enabled in Org. Try solution in non Person Account Org.
Error : The second Block Price for the Mobile Control Center App is not configured correctly. Check the Lower Bound, Upper Bound, and Price.
Solution : Create Block Line items as per below image. Salesforce is clearly asking for 1-4 but it needs 5 as upper limit. 5-10 but it needs 11 as upper limit.