I have encountered this too with the 2.0.0 version of this plugin.
I had the same error, also found this in the IE edge debugger
var a=new CustomEvent("malinkyLoadPostsStart")
Object doesn't support this action
I followed your workaround and downgraded to 1.3.0 and now it works with IE!
I hope this be fixed for the new updates so I can give 5 star review.