Show error message if user add failed.

app/assets/javascripts/app/lib/app_post/user_organization_autocompletion.coffee

@@ -298,12 +298,12 @@ class UserNew extends App.ControllerModal
   headPrefix: 'New'
 
   content: ->
-    controller = new App.ControllerForm(
+    @controller = new App.ControllerForm(
       model:     App.User
       screen:    'edit'
       autofocus: true
     )
-    controller.form
+    @controller.form
 
   onSubmit: (e) =>
     params = @formParam(e.target)
@@ -341,6 +341,8 @@ class UserNew extends App.ControllerModal
           ui.close()
         App.User.full(@id, callbackReload , true)
 
-      fail: ->
-        ui.close()
+      fail: (settings, details) ->
+        ui.log 'errors', details
+        ui.formEnable(e)
+        ui.controller.showAlert(details.error_human || details.error || 'Unable to create object!')
     )