My original question mentioned the Banners module. Then you asked what module I was talking about and specifically asked about the DAM module, so I thought I give it a try.

Now I know they both don't work ... I thought maybe they used a common component.

The original problem I was talking about was the "File Upload" functionality used in the "Add Banner" to a vendor (as shown in the screenshot).

Thanks.

The error shows up on the drag and drop. Clicking the "File Upload" button gives absolutely no response.