Plugin doesn't work on IE11 or Safari 9

[StudioVDS]

Hi,

I'm trying to this module to work on two older browsers. When I use the regular .js file it works on my modern browsers but not on IE11 and Safari 9. This is because the usage of ES6, but I guess using the .min.js file should fix this but when I add this I get the following error:

script.js?p2xyj9:7870 Uncaught TypeError: Cannot set property 'Marquee3k' of undefined