Hello, I am in beginner level of Salesforce. I need help, I already read and did all the steps from other forums about this Trailhead challenge but I still have the  error. 
Challenge Not yet complete... here's what's wrong: 
Could not find the 'Enter Feedback' quick action in the publisher for the 'Showing Layout' layout.  I would appreciate any help.
This is driving me crazy.
 

Hello, I am in beginner level of Salesforce. I need help, I already read and did all the steps from other forums about this Trailhead challenge but I still have the  error. 
Challenge Not yet complete... here's what's wrong: 
Could not find the 'Enter Feedback' quick action in the publisher for the 'Showing Layout' layout.  I would appreciate any help.
This is driving me crazy.
 

Admin Beginner | Salesforce1 Mobile Customization |Create Object-Specific Quick Actions
error: Challenge Not yet complete... here's what's wrong: 
Could not find the 'Enter Feedback' quick action in the publisher for the 'Showing Layout' layout.
More than 20 hours and still struggling to get through this. Please help.