🐛 BUG: Uncaught Error: Unknown loadManifest: /.next/server/next-font-manifest.json

[vietcavn]

Which Cloudflare product(s) does this pertain to?

Workers for Platforms

What versions are you using?

wrangler 3.109.1, next:15.1.7, react:19.0.0, react-dom:19.0.0

What operating system and version are you using?

Windows 11

Please provide a link to a minimal reproduction

No response

Describe the Bug

I follow steps on this link:
https://opennext.js.org/cloudflare/get-started
to deploy to Cloudflare workers but after running npm run preview command, I always get this error below:

⎔ Starting local server...
X [ERROR] service core:user:testing-app: Uncaught Error: Unknown loadManifest: /.next/server/next-font-manifest.json

at null.<anonymous> (worker.js:130682:13) in loadManifest
at null.<anonymous> (worker.js:241161:47) in getNextFontManifest
at null.<anonymous> (worker.js:128694:38) in Server
at null.<anonymous> (worker.js:240561:9) in NextNodeServer
at null.<anonymous> (worker.js:243112:22)

X [ERROR] The Workers runtime failed to start. There is likely additional logging output above.

I thought my app had something wrong with the configuration, so I created a brand new app. Without changing any code, I set up OpenNext for the Cloudflare Workers deployment following the steps mentioned in the opennext.js.org link above, but the error persists. I have also watched some YouTube videos about the deployment and followed the same steps, but I am still getting the same error with either the next-font-manifest.json or pages-manifest.json files.

Please provide any relevant error logs

Log.txt

[vicb]

Please use https://github.com/opennextjs/opennextjs-cloudflare to report errors for Open Next.

There is an existing issue there: opennextjs/opennextjs-cloudflare#321 (comment)

Closing this issue as we will handle it there

[vicb]

This should hopefully be fixed by #394 that will go into the next release

[logandx]

This should hopefully be fixed by #394 that will go into the next release

Is this issue fixed in @opennextjs/cloudflare version ^0.5.3 on Windows yet? I am still having the same issue today.

[vicb]

Please use https://github.com/opennextjs/opennextjs-cloudflare to report errors for Open Next.