Help with "Creating custom button for contact object"

Hi guys I need help with the last module of my trailhead hands-on challenge. I have created a custom button already for the contact object, I have also created a page layout for the contact object, but the challenge is adding the custom button to the contact layout. I keep having this error every time I try to run the solution.. " We couldn't find a button named 'Google_Info' on the 'Contact Layout' page layout." Could someone please help out. I have attached link to the module of Trailhead am currently working on.

Create Custom Buttons and Links Unit | Salesforce Trailhead