Show a warning when trying to push multiple patients but no patients match the filters

First screen: login, check all chekboxes, push "Next".
Second screen: enter filters that match 0 patients, click on "Push to XYZ"
Result, the first screen is displayed again, without any indication if something happened or if something was wrong.
Expected result: the user should receive a warning that no patients matched the filters, and the second screen remains displayed so the user can adjust filters.