SvelteKit: error when starting dev server: Error: write EOF / adapter-cloudflare

When trying to start a SvelteKit project of mine I am getting this error:

C:\...\svelte-app>npm run dev> svelte-mvp@0.0.1 dev> vite deverror when starting dev server:Error: write EOF    at WriteWrap.onWriteComplete [as oncomplete] (node:internal/stream_base_commons:94:16)

Versions:

node --versionv20.11.0

I can start other SvelteKit projects just fine and I can create a new SvelteKit project and start that without issue. Any ideas what this error even means and how to fix it?

Update #1

The error is related to the Cloudflare adapter:

svelte.config.js// This line causes the issues: import adapter from '@sveltejs/adapter-cloudflare';

Using '@sveltejs/adapter-auto' is a local workaround but the underlying issues is still unknown.