I have created a custom object as well as a tab for the custom object.  I can easily pull up the custom object to view it, however, I need to add a lookup field to the custom object and when I go into Setup-> Build-> Customize......my custom object is not visible in this section.  So, I can pull up the custom object on the tab to view, but I cannot figure out how to edit the page layout on it, or create a new lookup field on it when logged in as a System Administrator.

The challenge is to update contact mailing address fields when the parent account shipping address field values are updated.  For some reason, I am failing the challenge.  I have already verified that there are no validation rules active on my org that could be interfering with this.  Additionally, the process is definitely activated.  The first screenshot below shows my criteria for the action.  As you can see, I have it set to fire my immediate action if any of the parent account shipping addresses get changed.  

 

Second, in the next screenshot below you can see that my immediate action should be changing the mailing addresses to match the parent account shipping addresses.  Can someone please advise what I may be missing here?  The error message I'm getting from Trailhead says "An update to an account record failed to update the mailing address fields of all child contact records.  Make sure that the process is correct and that it is activated."

The challenge is to update contact mailing address fields when the parent account shipping address field values are updated.  For some reason, I am failing the challenge.  I have already verified that there are no validation rules active on my org that could be interfering with this.  Additionally, the process is definitely activated.  The first screenshot below shows my criteria for the action.  As you can see, I have it set to fire my immediate action if any of the parent account shipping addresses get changed.  

 

Second, in the next screenshot below you can see that my immediate action should be changing the mailing addresses to match the parent account shipping addresses.  Can someone please advise what I may be missing here?  The error message I'm getting from Trailhead says "An update to an account record failed to update the mailing address fields of all child contact records.  Make sure that the process is correct and that it is activated."