You must select at least one app permission for the authorization to work

FBomatic Automatic Post Generator and Facebook Auto Poster Plugin for WordPress when done all setting on video tutorial https://youtu.be/ds6PBBsIxeQ and when to login to facebook it show me this message "You must select at least one app permission for the authorization to work." And when choose one of permission for the authorization it does not accept and show message facebook "Invalid Scopes: manage_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" please check attach explain steps and error