How to show a list of objects by clicking on an element

Hello! I have a page that shows all professors of a school. I need to show a PopUp page every time I click on a professor’s name. This PopUp will show the list of students bound to this specific professor, in other words, each professor has one or more students and I need to show a list of them. My app has 2 pages: 1- Professor_Overview: Show a list of professors. 2- Professor_Students(popup): Must show the list of students according to the professor I’ve created a microflow that gets a professor as parameter and returns a list of students. But when I use a datagrid inside Professor_Students Popup(selecting microflow as datasource)  I get this error:  In short, I need to get a list of students(according to the professor) when I click on the button StudentsList (located in ‘Professor_Overview’). 
1 answers

In the professor overview use the datasource xpath to show all professors.

Then on click of the professor open the popup that contains the professor dataview and inside this dataview add a data grid that shows the students over association.