Describe the bug

After integrating Sentry, we observed that wrangler fails to run the app in preview mode, resulting in a crash.

Steps to reproduce

Link to minimum reproduction.

1. npm run preview
2. When Wrangler shows Ready on http://localhost:8787, press b in the terminal to open the browser.
3. The error will appear in the browser and terminal.

Expected behavior

The app should run without crashing.

@opennextjs/cloudflare version

@opennextjs/cloudflare@1.0.0-beta.2

Wrangler version

4.10.0

next info output

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 24.2.0: Fri Dec  6 19:01:59 PST 2024; root:xnu-11215.61.5~2/RELEASE_ARM64_T6000
  Available memory (MB): 16384
  Available CPU cores: 10
Binaries:
  Node: 23.6.0
  npm: 10.9.2
  Yarn: N/A
  pnpm: 7.14.2
Relevant Packages:
  next: 15.2.5 // There is a newer version (15.3.0) available, upgrade recommended!
  eslint-config-next: 15.2.5
  react: 19.1.0
  react-dom: 19.1.0
  typescript: 5.8.3
Next.js Config:
  output: N/A

Additional context

I also tested with @opennextjs/cloudflare@0.6.6 — the result was the same.

For Sentry, I tried both the manual setup from Sentry’s documentation and the server-side configuration mentioned in your OpenNext AWS docs. In both cases, the app still crashes when using preview mode with Wrangler.