I'm working on the Quick Start: Lightning App Builder project and I'm on the Add More Components. When I click the button to verify the step I get teh following error:

Step Not yet complete... here's what's wrong: 
The 'Field Sales App' Lightning App was not found. 
Note: you may run into errors if you've skipped previous steps.

I have successfully completed the previous steps and verified them. The 'Field Service App' exists and it even shows up in Salesforece1 on my mobile device. Any ideas on why it wont verify or how I can correct this so that I can proceed?

Thanks.

When attempting to create my Apex trigger for this Trailhead development exercise, I receive an error. I don't understand how this is possible, because the records haven't been updated, and still aren't updating.
"Challenge not yet complete... here's what's wrong:
Setting 'Match_Billing_Address__c' to false updated the records anyway. The trigger should only act when Match_Billing_Address__c is true."

Here's my code:
trigger AccountAddressTrigger on Account (before insert, before update) {

    for(Account a : Trigger.new){
        If (a.Match_Billing_Address__c = true) {
            a.ShippingPostalCode = a.BillingPostalCode;
        }   
    }

}