Error Message - should be selected

If I click on an action button in a grid, I’m getting the error saying “should be selected” though I have selected the grid item. But this wont happen when I click on Delete button instead of clicking the action button which I have created. How can I resolve this error? Below I have selected Mendix Studio Version as 8.9.0 but I use the 9.0.2 and its not available in the list below to select.
1 answers

Fastest way to solve this is to have Mendix generate pages for that entity. To do that go to the domain model, rightclick the entity and select ‘Generate overview pages’