# Dev server crashes after V4 migration with deno as build preset
Uncaught (in promise) TypeError: Failed to fetch dynamically imported module in dev mode nuxt > 3.15.1
pending triageneeds reproduction
`<style>` block causes error on browser back on `nuxt dev`
good first issueworkaround availablepending triagedxbugviteneeds reproduction
API request failed: [POST] "http://XXXX": <no response> fetch failed
pending triageneeds reproduction
ECONNREFUSED on NodeJS 18
3.xpending triageneeds reproductionclosed-by-bot