500: Failed to fetch dynamically imported module

Describe the bug

I am encountering some issues when deploying my project to vercel using the vercel-adapter. The project builds but then the deployed site I receive 500 Failed to fetch dynamically imported module: https://xxx.vercel.app/_app/undefined

The vercel build is triggered by a new Gitlab commit.

Does someone have an idea what could cause this issue? The weird thing is that it works with npm run build but not on the deployed vercel site…

Reproduction

This should be reproducable by using the same sveltekit + adapter versions

Logs

No response

System Info

System:
    OS: Windows 10 10.0.19044
    CPU: (8) x64 Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz
    Memory: 13.49 GB / 31.91 GB
  Binaries:
    Node: 16.13.1 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.22.4 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
    npm: 8.3.0 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Chrome: 97.0.4692.71
    Edge: Spartan (44.19041.1266.0), Chromium (97.0.1072.55)
    Internet Explorer: 11.0.19041.1202
  npmPackages:
    @sveltejs/adapter-auto: next => 1.0.0-next.10
    @sveltejs/adapter-vercel: next => 1.0.0-next.36
    @sveltejs/kit: ^1.0.0-next.225 => 1.0.0-next.225
    svelte: ^3.46.0 => 3.46.0

Severity

blocking all usage of SvelteKit

Additional Information

No response

[bitdom8]

Hi got the latest sveltekit, got this error Failed to fetch dynamically imported module:

[lazharichir]

For me, it was an adblocker blocking some resources (i.e., there was an “ads” somewhere in the URI).