The PNG image is not empty - you seem to have exported the selected rectangle at 1dpi, which results in a tiny bitmap image of 3x5 px (not much detail can be stored in such few pixels).
Default export resolution for bitmap images is 90dpi - could you please try again using a larger output resolution than 1dpi, or otherwise provide more information about your export settings (and possibly reasons why you need a tiny 3x5px PNG image of the SVG drawing)?
The PNG image is not empty - you seem to have exported the selected rectangle at 1dpi, which results in a tiny bitmap image of 3x5 px (not much detail can be stored in such few pixels).
Default export resolution for bitmap images is 90dpi - could you please try again using a larger output resolution than 1dpi, or otherwise provide more information about your export settings (and possibly reasons why you need a tiny 3x5px PNG image of the SVG drawing)?
Recommended reading: tavmjong. free.fr/ INKSCAPE/ MANUAL/ html/File- Export. html#File- Export- PNG
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