Configuration file issue using omod v 1.2.0

Uploaded new omod version 1.2.0 and on testing, am unable to add a form to an existing configuration. It rotates endlessly and throws the error below;

 
TypeError: Cannot read property 'concepts' of null
   at ConfigController.js?v=2.1.2:121
   at processQueue (angular.js?v=2.1.2:16383)
   at angular.js?v=2.1.2:16399
   at Scope.$eval (angular.js?v=2.1.2:17682)
   at Scope.$digest (angular.js?v=2.1.2:17495)
   at Scope.$apply (angular.js?v=2.1.2:17790)
   at done (angular.js?v=2.1.2:11831)
   at completeRequest (angular.js?v=2.1.2:12033)
   at XMLHttpRequest.requestLoaded (angular.js?v=2.1.2:11966)