Javascript error when creating new assignments

[kitsook]

ComPAIR version 1.2.4

Scenario:

• create a new assignment
• input all mandatory fields without changing the Answer Ends time
  
• click save

The assignment saved successfully with the following javascript error shown on developer console:

Error: $scope.date.aend.time.toTimeString is not a function
$scope.showAssignmentErrors@http://localhost:8080/app/modules/assignment/assignment-module.js:1938:108
fn@http://localhost:8080/app/lib/angular/angular.js line 15126 > Function:4:550
expensiveCheckFn@http://localhost:8080/app/lib/angular/angular.js:16213:18
callback@http://localhost:8080/app/lib/angular/angular.js:26592:19
$eval@http://localhost:8080/app/lib/angular/angular.js:17994:28
$apply@http://localhost:8080/app/lib/angular/angular.js:18094:25
ngEventHandler/<@http://localhost:8080/app/lib/angular/angular.js:26597:23
dispatch@http://localhost:8080/app/lib/jquery/dist/jquery.js:4737:27
add/elemData.handle@http://localhost:8080/app/lib/jquery/dist/jquery.js:4549:28