Jquery-knob.js throwing error G_vmlCanvasManager.initElement is not a function

Question

I'm using jquery.knob.js in angular application. I included the scripts in angular-cli.json like this.

"scripts": [
        "assets/app/vendors/js/vendors.min.js",
        "assets/js/jquery.knob.min.js",       
        "assets/app/js/core/app-menu.js",
        "assets/js/jquery.sparkline.min.js",
        "assets/js/echarts/echarts.js"
      ],

But I'm getting error saying that ERROR TypeError: G_vmlCanvasManager.initElement is not a function.

The knobs are working when I'm reloading the page but sometimes not working when I'm changing routes.