What do you want to do in this microflow?
If you want to run it, then you could try this workaround. Open a page and on the page you have a dataview which is based on microflow. in that Micrflow it will run your action. You need to return an object, for this you can use a inpersistant object with no attributes as helper.
It think it is showing nothing, because you are not displaying a page.