It worked. Thank you! One thing to note is when using Vaadin 14 I had to ad

It worked. Thank you! One thing to note is when using Vaadin 14 I had to add

<dependency>
  <groupId>org.json</groupId>
  <artifactId>json</artifactId>
  <version>20201115</version>
</dependency>

to make the C3Chart render without exceptions.