Issue with preload_file Attribute in whiteboard_features (QuickJoin API Example)

[Saber-ebr]

Hi,
I’m encountering a problem while using the preload_file attribute under whiteboard_features in the QuickJoin example file for joining meetings via the API.

Specifically:

"whiteboard_features" => array(
                "allowed_whiteboard" => true,
                "preload_file" => "https://mydomain.com/lesson2.pdf"
        ),

The feature does not seem to function as expected when attempting to preload files onto the whiteboard during the meeting.
I’ve followed the API documentation, but it’s unclear if additional configurations are required or if I’ve missed something.
Could you provide clarification or examples of how to correctly implement the preload_file attribute in this context?
Any guidance or troubleshooting tips would be greatly appreciated.

Thanks in advance!