From your question it is not inmediately clear which widget you have use. Try to always use the name as in the marketplace. But we have used this widget to grab screenshots: https://marketplace.mendix.com/link/component/27069 and that one works.
Regards,
Ronald
Hi Martin,
Please take a look into this as well JFree Charts https://marketplace.mendix.com/link/component/3011
This allows to take a screen into image and export as PDF on click as well.
We used in one of the project and worked well, when compared to Print page to PDF module.
Ronald, I used excactly that widget you recommended.
Unfortunatelly the result is not good:
Thats how I created it: