I found given below error when I check Challenge. Even I do all write things.
Challenge Not yet complete... here's what's wrong: 
The 'Basic Account User' profile did not have the appropriate object and field-level security for the Account object

Challenge Not yet complete... here's what's wrong: 
The 'Account Reviewer' profile does not work as expected.

I found given below error when I check Challenge. Even I do all write things.
Challenge Not yet complete... here's what's wrong: 
All the expected custom fields for the Campsite_Reservation__c object could not be found.

I found given below error when I check Challenge. Even I do all write things.
Challenge Not yet complete... here's what's wrong: 
The 'Days_Since_Last_Update__c' formula field did not return the correct number of days between an Account’s Last Activity Date and today