diff --git a/addons/website/static/lib/summernote/src/js/module/Popover.js b/addons/website/static/lib/summernote/src/js/module/Popover.js
index ec40dc6e7d4..e0531f06c45 100644
--- a/addons/website/static/lib/summernote/src/js/module/Popover.js
+++ b/addons/website/static/lib/summernote/src/js/module/Popover.js
@@ -71,11 +71,14 @@ define([
 
       var $airPopover = $popover.find('.note-air-popover');
       if (isAirMode && !styleInfo.range.isCollapsed()) {
-        var bnd = func.rect2bnd(list.last(styleInfo.range.getClientRects()));
-        showPopover($airPopover, {
-          left: Math.max(bnd.left + bnd.width / 2 - PX_POPOVER_ARROW_OFFSET_X, 0),
-          top: bnd.top + bnd.height
-        });
+        var rect = list.last(styleInfo.range.getClientRects());
+        if (rect) {
+          var bnd = func.rect2bnd(rect);
+          showPopover($airPopover, {
+            left: Math.max(bnd.left + bnd.width / 2 - PX_POPOVER_ARROW_OFFSET_X, 0),
+            top: bnd.top + bnd.height
+          });
+        }
       } else {
         $airPopover.hide();
       }