The social links drove me crazy. Here’s how you do it. first create a new menu called something like social menu. It doesn’t matter what you call it so long as it’s different than your main menu.
Next create some custom links. One for each social icon you want displayed. for the url you put in the actual url you are pointing at. FOr the Navigation Label put the Social icon name like so ‘name’ so Facebook would be ‘Facebook’
Finally assign the new menu to the social on primary menu. and save menu.
Voila, done.