sveltekit is not a valid ssr component

When working with svelte and sapper you to have think about 2 types of rendering : client side rendering (sveltjs, js) and server side rendering (SSR), it's sapper (nodejs or expressjs), there are a few ways to handle this, but according to the document of dependency you are using : for SSR you consider to import like this: Are there conventions to indicate a new item in a list? Why are non-Western countries siding with China in the UN? Disabling SSR may mask problems with your code you may then only find when you try to build your project for preview or to upload to the graphics server. But beyond that, building an app with all the modern best practices is fiendishly complicated. I've removed the dev dependency and re-added carbon 0.39 as direct dependency, but the problem persists. Based on this example from Svelte for nested components, this should be a totally trivial exercise, no