Unable to Save job configuration changes

[Milan Satpathy]

Hi,

When I click "Save" after making changes to a job configuration (Build periodically > Schedule) , the browser displays "This webpage is not available".
On trying to refresh the page it shows:

Status Code: 400

Exception: Nothing is submitted
Stacktrace:

(none)

...And the changes are not saved!!

Any suggestions on how to fix this issue ?

Thanks,
Milan