makes me think (know), that the js-file is probably not loaded correctly.
Checklist:
In the developer-tools, when you switch to network, what exactly is the response of the requested js-file?
(like is it really the expected content, or maybe a server-error?)
Have you tried downloading the js-file and serving it to your application locally?
I'm trying to intwegrate WebGL but when i run the same in browser i'm getting this error: