Error: Component is missing template or render function

[florianingerl]

I try to use the tree-navigation-component.
I include it via the script tag at the end of the body in the html
`<script src="https://unpkg.com/vue@latest"></script>
<script src="https://unpkg.com/vue-tree-navigation@4.0.0/dist/vue-tree-navigation.js"></script>

<script src="assets/js/vue-app-uebung.js"></script>`

In vue-app.uebung.js, when I say
console.log(VueTreeNavigation.template)
it gives me undefined.

When I include the component somewhere, it give me the error Component is missing template or render functioin.

When I add the line
VueTreeNavigation.template = "<div>Hello, my name is Florian</div>
then the error disappears.

I am using Vue3. What do I do wrong?