Little Hometown review for Facebook & Instagram

This app will not install on my store. I've tried multiple browsers, computers, phones, and internet connections. Tried incognito and cache and all the basic "restarting" IT fixes. I go through the whole process and it says it's intalled, and then I immediately get an error saying "there was a problem processing this action" Shopify blames this all on FB and there is no support team to contact at FB to me to resolve this issue.