vt7 - Calendar not show records in Month Week Day or Agenda

I would say this happened after calendar library update

error in response : Error: Stack trace: Request/this._request/ajaxParams.error@http://localhost:8888/vt7/layouts/v7/resources/application.js?v=7.0.0:83:24 n.Callbacks/j@http://localhost:8888/vt7/layouts/v7/lib/jquery/jquery.min.js?v=7.0.0:2:27131 n.Callbacks/k.fireWith@http://localhost:8888/vt7/layouts/v7/lib/jquery/jquery.min.js?v=7.0.0:2:27949 x@http://localhost:8888/vt7/layouts/v7/lib/jquery/jquery.min.js?v=7.0.0:4:22267 .send/b@http://localhost:8888/vt7/layouts/v7/lib/jquery/jquery.min.js?v=7.0.0:4:26298