Experience Builder for Developers v1.5 - chart widget fails to load once app deployed

[KayceeFaunce]

I'm using the chart widget in an ExB application. It works fine when running locally on my machine, but once I deploy the app on our server, the chart widget fails to load and I receive the following console errors:

If I follow the path on my server, I can see that the 53.bundle.js file is present. For what it's worth, the application (and chart) uses protected feature services that requires sign-in to access. Not sure if this could result in the issues? Any insight?

[KayceeFaunce]

To provide additional information - today I experimented with re-downloading ExB for Developers v. 1.5, transferring over my app to the fresh download, then re-deploying on my web server. However, the same problem is occurring. I am just using the out-of-box chart with some minor aesthetic adjustments performed through the GUI.