minetestmapper not working

 minetestmapper -i '/home/independent/snap/minetest/1744/worlds/ghueworld'  -o "/home/nicholas/Documents/dnow/lol.png" --geometry -10000:-10000+20000+20000
Warning: The width or height of the image to be created exceeds 4096 pixels! (Dimensions: 20000x20000)
Exception: Error saving image