I installed the OutSystems Data Grid Sample project in a clean environment withouth dependencies to test and the checkbox column type doesn't show any checkbox (stays blank).
Hi @Mykhaylo Hryhoryev
This issue was detected last week and is a regression that is currently being fixed. We expect a patch to be released this week.
In the meantime, I think this workaround should unblock you:
Best Regards,GM
Same issue here, upgraded to the version released in December (2.21.0) and each screen that contains checkboxes has a blank column now.