Cannot Add User

Try adding the API version without coma in the social post Facebook configuration form, for example in my case I just added 18

I think it will make sense to update the documentation under the graph api version field. Currently it says to copy from facebook, but you are correct that it is an integer field, so really just use the up/down arrows to select the api version that matches the API version of your facebook app

I went ahead and merged the changes, but will keep this in needs review for the moment in case there happen to be any further feedback