"This report is not accessible" message in published page

"This report is not accessible" message in published page

I have created an application with some reports.

The application includes a page with buttons, each of them with an "Open report" Action type. 
I have published the page to share it with final users, and when any of them clicks on a button, a page with the message "This report is not accessible" appears . Of course, this is not the desired behaviour.

Which setting should I change in order for this to work?

Thanks in advance.