image not uploading while using custom map

Hello,
I have used RVM plugin and used default “world map”. https://sannams4.com/test/.

But i realised the head shape of India map is little out of shape.

I wanted to add a custom image. when i try add a downloaded image https://sannams4.com/wp-content/uploads/2019/12/world.png

im getting “Damn it… Something went wrong ! Please check if name of the map is correct ( place just map name) or if you have uploaded the map previous month and try again uploading map now using wordpress media uploader.” error.

Please help!! Thanks in advance.