Challenge Not yet complete... here's what's wrong: 
The 'Account' profile did not have the appropriate object and field-level security for the Account object.

I dont know what to do here

Challenge Not yet complete... here's what's wrong:  The user's profile was not set to System Administrator
I have created new user>Made it as Admin>Then Unchecked the active button.
Still getting the same error.

Challenge Not yet complete... here's what's wrong:  The user's profile was not set to System Administrator
I have created new user>Made it as Admin>Then Unchecked the active button.
Still getting the same error.

https://developer.salesforce.com/trailhead/force_com_introduction/data_management/data_import
In trail head challenge, after csv file imported and mapped accordingly as per the challenge condition, I'm getting the below error:

Challenge Not yet complete... here's what's wrong:
All the contact records from the CSV file were not found in the Org.