Can you update your PHP version to a version like 7.3 or sth like that?
You can do this in your Webhost Control Panel.
Screenshot 2020-09-30 at 10.20.03.png
Hey so I had another look and SVG cursors need to have a width and height set in pixels in the svg's code.
So do this:
https://stackoverflow.com/questions/46706847/cursor-svg-not-working-in-chrome-61-0-3163-100