What steps will reproduce the problem?
1. Click on "New" control
2. Leave all the fields empty, except for "student no." one putting there some numbers
3. Click "create"
Expected result
There appears an pop-up window with inquired and optional fields. After leaving the fields empty, except for "student no." one filled with any numbers and clicking the "create" button there appeares a message about an error and the inquired fields are highlighted somehow (e.g. their frames become red)
Actual result
The pop-up window closes. A new user is not created
The same test was used for Google Chrome 30.0, Opera 17.0 and Internet explorer 9.0. The results are the same.