Unable to run dash_interactive_graphviz

Question

I created a huge Graphviz Network, which I now want to spice up with some interactivity. For this goal I discovered the package dash_interactive_graphviz. From my understanding I can simple provide my existing graph, but I'm already failing to execute the provided sample (see below):

import dash_interactive_graphviz

dot_source = """
digraph  {
  node[style="filled"]
  a ->b->d
  a->c->d
}
"""

dash_interactive_graphviz.DashInteractiveGraphviz(
    id="graph",
    dot_source=dot_source
)

The package itself and all requirements are fulfilled. I run the sample code from above in Visual Studio Code, but nothing happens (no output, no message, no error).

Anybody who can point me in the right direction? Thanks.