Fix #1276

dist/js/app.js

@@ -257,13 +257,14 @@ function _init() {
       // Remove overflow from .wrapper if layout-boxed exists
       $(".layout-boxed > .wrapper").css('overflow', 'hidden');
       //Get window height and the wrapper height
-      var neg = $('.main-header').outerHeight() + $('.main-footer').outerHeight();
+      var footer_height = $('.main-footer').outerHeight() || 0;
+      var neg = $('.main-header').outerHeight() + footer_height;
       var window_height = $(window).height();
-      var sidebar_height = $(".sidebar").height();
+      var sidebar_height = $(".sidebar").height() || 0;
       //Set the min-height of the content and sidebar based on the
       //the height of the document.
       if ($("body").hasClass("fixed")) {
-        $(".content-wrapper, .right-side").css('min-height', window_height - $('.main-footer').outerHeight());
+        $(".content-wrapper, .right-side").css('min-height', window_height - footer_height);
       } else {
         var postSetWidth;
         if (window_height >= sidebar_height) {