fix

src/forge/Head/Header.js

@@ -441,6 +441,8 @@ class NewHeader extends Component {
               <ul id="header-nav">
                 {
                   settings.navbar && settings.navbar.map((item, key) => {
+                    if (!item.link) return;
+                    
                     var new_link = item.link;
                     var user_login = this.props.user && this.props.user.login;
                     var is_hidden = item.hidden