Ricardo Martinez Grazziani

+1 for this

The error seems to occur in: ng2-tree\src\tree.js: 858.   function () {          return this.node._status === tree_types_1.TreeStatus.New;      };

I think it's related to the "buildOptimizer". I turned it off in the file "angular.json" (configurations-> production-> buildOptimizer). I have set it to "false" and now it works for me...