Trying to connect the facebook page I get this message:

Any suggestions how to solve it?

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

I've split your question to a new topic.

That error suggests the setup isn't quite right.

The scopes named "manage_pages" and "publish_pages" don't seem to be set correctly.

Have you read the Permissions Reference page at that URL you linked, as well as our documentation for setting up Facebook?

Please refer to those documents to check those settings, and if you do get stuck, feel free to reply here or contact support via the client area.