Closed
Description
Describe the bug
After upgrading from 0.5.12 to 0.6.2, running the preview server with opennextjs-cloudflare build && opennextjs-cloudflare preview leads to the app building and starting correctly, but when visiting http://localhost:8787 I'm facing this error TypeError: handler3 is not a function.
EDIT 1: I tried a deployment and the same happens here. So it's not limited to preview.
EDIT 2: Downgrading to 0.6.1 and 0.6.0 didn't solve the issue, so it has likely be introduced in 0.6.0
EDIT 3: Downgrading to 0.5.12 solved the issue, without having to downgrade Wrangler. So that confirms that the issue is very likely related to opennextjs-cloudflare.
Steps to reproduce
- Upgrade to 0.6.2
- Run preview
Expected behavior
The preview running without error :)
@opennextjs/cloudflare version
0.6.2
Wrangler version
4.5.0
next info output
Operating System:
Platform: darwin
Arch: arm64
Version: Darwin Kernel Version 24.4.0: Wed Mar 12 21:20:55 PDT 2025; root:xnu-11417.101.13~4/RELEASE_ARM64_T6031
Available memory (MB): 131072
Available CPU cores: 16
Binaries:
Node: 23.3.0
npm: 10.9.0
Yarn: N/A
pnpm: N/A
Relevant Packages:
next: 15.2.4 // Latest available version is detected (15.2.4).
eslint-config-next: N/A
react: 19.0.0
react-dom: 19.0.0
typescript: 5.8.2
Next.js Config:
output: N/AAdditional context
No response