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 `

`

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?