I am essentially trying to narrow down exactly where in my code this error is caused at. The code ran on PrimeFaces 8.0 without any issues, but starting with PrimeFaces 10.0.0, I receive the following error:
" PanelGrid "..." without a 'columns' attribute expects at least one <p:row> element.
I can see the specific spot at which the the exception is thrown in PrimeFaces on GitHub. If anyone knows what exactly this change was implemented for or more broadly, what it does, I would greatly appreciate an explanation.
You can easily check what has changed when and by whom in GitHub by clicking the "blame" button (top right of a source file).
Commits usually contain / start with the issue number the commit fixes. In this case #6563: DataTable: filtering doesn't work inside p:panelGrid. You can find all the details and pull request there.