Hello,
It's quite strange that you don't have any displayed results in your screenshot, have a look on mine :
A little tricks to create your mass-action, first set your filters and for your action choose
display the results & define which columns of your targeted elements to see.
From my screenshot this will display
124 products (results), then define your actions like my screenshot.
If you have defined an action and nothing is processed, then provide your
complete massaction screenshot.
Awaiting your returns to progress on your subject.
Regards