Pages Public Content Access requires either app secret proof or an app token socialfeed code example

Example: (#100) pages public content access requires either app secret proof or an app token

There is a changes in the facebook scope new scopes instead of manage_pages
and page_insights :
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<fb:login-button size="large" scope="public_profile,email,pages_show_list,
read_insights,pages_read_user_content,pages_read_engagement,
pages_manage_metadata,pages_manage_ads" onlogin="checkLoginState();">
	Click here to sync
</fb:login-button>