Update request button not working

If I click the edit button at the top of a request, and then edit the request, when I click on the "Update Request" button, it depresses, but nothing happens. No sign that anything is being saved, but no error request either.

If I use the Request Details Edit button further down the page in the main request view. Editing works fine. But it's more intuitive to be able to use the other button successfully.

Any ideas what might cause this?

Edit: We are also having a problem when technicians try to create new requests. The description field is not visible/available, and as with edited requests, the nothing happens when the button is clicked to submit the new request.