You can check that this page exists and is working by using your store URL and adding /pages/pp-facebook to the end. Please note that Safari browser will not display the code, but what you should see is a text file containing all your store data if you use a compatible browser
What if you do not see anything or get a 404 page?
Firstly, go to your Shopify settings and the online store/pages section. Look for the page pp-facebook.
If the page does not exist, you can create it as per the attached screenshot.
The page title should be pp-facebookThe template (bottom right) should be page.pp-rssThe visibility MUST be visible for online store
If the page DOES exist, please check the visibility is OK for online store
If this is all correct, please check that you have not got any redirects for this page in place
If all is correct, please check that you have set your FEED in the Pixel Perfect dashboard to the standard - products only and 1000
This should resolve any issues you may have with the product feed