Getting Font download errors on Vercel | Astro Lounge | Page 1

undone tusk Nov 13, 2025, 10:20 AM

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We're running into the following issue this morning:

[CannotFetchFontFile] [astro:fonts] An error occurred while fetching the font file from https://fonts.bunny.net/jetbrains-mono/files/jetbrains-mono-greek-400-italic.woff
  Hint:
    This is often caused by connectivity issues. If the error persists, open an issue at https://github.com/withastro/astro/issues.
  Error reference:
    https://docs.astro.build/en/reference/errors/cannot-fetch-font-file/
  Stack trace:
    at Object.handle (file:///vercel/path1/node_modules/.pnpm/astro@5.14.4_@planetscale+database@1.19.0_@types+node@24.7.2_@vercel+functions@3.1.3_idb-keyv_2xwahafm4jszsp7z2d6gx65mdu/node_modules/astro/dist/assets/fonts/implementations/error-handler.js:35:14)
    at processTicksAndRejections (node:internal/process/task_queues:105:5)
    at listOnTimeout (node:internal/timers:549:9)
    at async cache (file:///vercel/path1/node_modules/.pnpm/astro@5.14.4_@planetscale+database@1.19.0_@types+node@24.7.2_@vercel+functions@3.1.3_idb-keyv_2xwahafm4jszsp7z2d6gx65mdu/node_modules/astro/dist/assets/fonts/utils.js:46:16)
    at async file:///vercel/path1/node_modules/.pnpm/astro@5.14.4_@planetscale+database@1.19.0_@types+node@24.7.2_@vercel+functions@3.1.3_idb-keyv_2xwahafm4jszsp7z2d6gx65mdu/node_modules/astro/dist/assets/fonts/vite-plugin-fonts.js:267:28
  Caused by:
  fetch failed
    at node:internal/deps/undici/undici:14900:13
    at runNextTicks (node:internal/process/task_queues:69:3)
    at process.processTimers (node:internal/timers:523:7)
    at async cache (file:///vercel/path1/node_modules/.pnpm/astro@5.14.4_@planetscale+database@1.19.0_@types+node@24.7.2_@vercel+functions@3.1.3_idb-keyv_2xwahafm4jszsp7z2d6gx65mdu/node_modules/astro/dist/assets/fonts/utils.js:46:16)
    at async file:///vercel/path1/node_modules/.pnpm/astro@5.14.4_@planetscale+database@1.19.0_@types+node@24.7.2_@vercel+functions@3.1.3_idb-keyv_2xwahafm4jszsp7z2d6gx65mdu/node_modules/astro/dist/assets/fonts/vite-plugin-fonts.js:267:28
 ELIFECYCLE  Command failed with exit code 1.
Error: Command "pnpm run build" exited with 1

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pinging @wise ginkgo 🙂

wise ginkgo Nov 13, 2025, 10:27 AM

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I hoped the stacktrace would be more useful...

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It works locally for you right?

undone tusk Nov 13, 2025, 10:43 AM

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yea

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and if i open the URL in the browser it starts downloading it, too

wise ginkgo Nov 13, 2025, 10:49 AM

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Can you try updating your astro config so it fetches this file? eg.

import { defineConfig } from '...'

const res = await fetch("https://fonts.bunny.net/jetbrains-mono/files/jetbrains-mono-greek-400-italic.woff")
console.log(res.status)

export default defineConfig({

})

Basically I want to see if it's Astro specific

undone tusk Nov 13, 2025, 10:52 AM

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and have that be deployed on vercel, too?

wise ginkgo Nov 13, 2025, 10:55 AM

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Yes 👍

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We'll see if it fails during the build phase

undone tusk Nov 13, 2025, 5:31 PM

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wise ginkgo We'll see if it fails during the build phase

btw, we just pushed another commit during the day and it magically fixed it self (we only updated some images, so nothing related).

I guess this was just an issue on Vercel <-> BunnyCDN then?

wise ginkgo Nov 13, 2025, 6:42 PM

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Great! Honestly no idea, we literally just do a fetch call

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Btw if I coded this well, the font files are cached in node modules and since vercel restores the node modules, it shouldn't re download these files

undone tusk Nov 13, 2025, 6:56 PM

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wise ginkgo Btw if I coded this well, the font files are cached in node modules and since ve...

yeah, but when you do dependency updates that breaks the cache 😅

#Getting Font download errors on Vercel