Can't Export Layout


I'm trying to export a layout to an xml file, but I keep getting a blank page after I press the Export button (the url changes to …/admin.php)

I've tried both output methods, ie “direct download” and “screen”.

I'm using the latest cs-cart 4.1.3 (Even v3, is doing the same)

Does anyone know what the issue could be. I'm guessing it's some server setting.