Error Integrating Library: FusionCharts to PI VISION Extensibility

I have a problem using a chart library called "FusionCharts" with PI VISION Extensibility: "Uncaught ReferenceError: FusionCharts is not defined".

To do this, I copied the library to the "Symbol\ext" folder and tried to import and reference them in N ways, but I can't achieve it, but I always return to the same error.

For example:

According to FusionCharts the normal reference is as follows:

https://www.fusioncharts.com/dev/getting-started/plain-javascript/configure-your-chart-using-plain-javascript 

(*) In the company for internal developments we use FusionCharts, so I would like to know if it is possible to integrate this library into PI VISION.