Modal window not opening in Screen Flow
I am trying to render a modal dialogue popup onclick of a custom button in screen flow UI. But the application is opening the popup showing Pega error "There has been an issue; please consult your system administrator".
Onclick of the custom button in the screen flow UI, I have added an action 'Add Item' to append a pagelist and then added a Local Action as 'Modal Dialogue'. The custom button is outside the pagelist grid. The Tracer is recording nothing onclick of this particular button. In clipboard I see no pagelist has been added onclick of this button.
Pega version used: 7.4. No framework present.
Please suggest what may be the root cause of the problem. Screenshot attached.
***Edited by Moderator: Pallavi to update platform capability tags***