Could you consider following suggestion as a new feature requests  (service desk plus)?

1. After I click on 'add request' button I would like to see message like this: adding new request in progress. In same time, template should be hidden or inaccessible.

2. Message of error should appear, also when necessary fields are unfilled or wrong filled. In this situation, template should be also inaccessible.

3. Wrong filled or unfilled fields should nbe marked by other colour.