We're having trouble with the "Extending Reports using the AppExchange" module in Trailhead

We keep getting the same error when checking the challenge at the end of the module:

Challenge not yet complete... here's what's wrong: 
The 'LEAD Trend by Source' dashboard component does not have the wedges set to 'Lead Source'.

Wedges ARE set to 'Lead Source', did anybody get this error message? do you know what the solution may be? Thank you!

Hi Experts,
I am trying to solve this challenge but not able to solve because of salesfore license issue. Salesforce only allows 2 'Salesfoce' license for DE. Is there a way to solve this challenge? Please help.

Create a Profile and Permission Set to properly handle field access
The Marketing Coordinator and Account Manager both require access to view and update Account Records, but only the Account Manager should be able to see and edit certain fields. Specifically, only the Account Manager should be able to see and edit the Rating field. The Marketing Coordinator should not be able to see or edit the Rating field. Create one profile and one permission set with the appropriate field-level security to solve for this use case.The profile must be named 'Basic Account User' and result in an API name of 'Basic_Account_User'. It should use the 'Salesforce' user license type.
The permission set must be named ‘Account Rating’ and result in an API name of 'Account_Rating'.