Vaadin 14 - Charts appearing in dev but not on server

I have built my first Vaadin 14 application. This one is for a client who needs oil usage charting.
I am developing in IntelliJ and on a Windows 10 machine. When running it locally, either in production or debug, the charts work fine.
I deploy the application to a Wildfly server on Linux. The application runs fine, buttons work and calculations are fine.
The charts do not show up at all. Also there are no error message or messages of any kind that would indicate why.
Do I need to install something directly on the Wildfly server?

Help is greatly appreciated.