Follow along with the video below to see how to install our site as a web app on your home screen.
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10.3.1) Visit https://developers.facebook.com/tools/debug/accesstoken/ and paste your token
The importants part on that page are
- Type should mention "Page"
- Expires should mention "Never"
- Data Access Expires should mention "Never"
- Valid should mention "True"
- Scopes should mention "manage_pages, pages_show_list, publish_pages, public_profile"
The following permissions do not expire:
- ads_read business_management
- configure_page_transactions
- manage_pages
- pages_manage_cta
- pages_manage_instant_articles
- pages_messaging
- pages_show_list
- publish_pages
- read_audience_network_insights
- read_insights ads_management
Invalid Scopes: manage_pages, publish_pages. This message is only shown to developers. Users of your app will ignore these permissions if present. Please read the documentation for valid permissions at: https://developers.facebook.com/docs/facebook-login/permissions

$permissions = array('manage_pages', 'publish_pages');
$permissions = array('pages_manage_posts');