Public boards loaded incompletly

seen at: #4024

Console:
Meteor.user().isBoardAdmin() is undefined

client/components/boards/boardBody.js

@@ -216,7 +216,7 @@ BlazeComponent.extendComponent({
       $swimlanesDom.sortable(
         'option',
         'disabled',
-        !Meteor.user().isBoardAdmin(),
+        !Meteor.user() || !Meteor.user().isBoardAdmin(),
       );
     });
 

client/components/swimlanes/swimlanes.js

@@ -123,7 +123,7 @@ function initSortable(boardComponent, $listsDom) {
         'disabled',
         // Disable drag-dropping when user is not member/is worker
         //!userIsMember() || Meteor.user().isWorker(),
-        !Meteor.user().isBoardAdmin(),
+        !Meteor.user() || !Meteor.user().isBoardAdmin(),
         // Not disable drag-dropping while in multi-selection mode
         // MultiSelection.isActive() || !userIsMember(),
       );