npm run dev but server didn't start

[tsunhua]

Describe the bug
I attempted to run the project using "npm run dev", but the server did not start. Although the terminal printed some logs, no error messages were displayed. Here are the logs:

 npm run dev

> [email protected] dev
> npm run prepare:data && cross-env NODE_ENV='development' next dev


> [email protected] prepare:data
> node gen/generate-chatgpt-by-category.js

ready - started server on 0.0.0.0:3000, url: http://localhost:3000
info  - Loaded env from /Users/xxx/project/chat-flow/.env
warn  - You have enabled experimental feature (appDir) in next.config.js.
warn  - Experimental features are not covered by semver, and may cause unexpected or broken application behavior. Use at your own risk.

info  - Thank you for testing `appDir` please leave your feedback at https://nextjs.link/app-feedback
(node:62230) ExperimentalWarning: The Fetch API is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)

(base) 

To Reproduce
According the guide

Expected behavior
The server started

Screenshots
none

Desktop (please complete the following information):

• OS: macOS

[phodal]

it looks good
had you try visit http://0.0.0.0:3000

[tsunhua]

When I visit http://0.0.0.0:3000/, it displays HTTP ERROR 502. I tried executing the following command to check if there were any processes listening on port 3000, but nothing was returned.

$ lsof -i:3000

[phodal]

here is my log, it seems same to yours

> [email protected] dev
> npm run prepare:data && cross-env NODE_ENV='development' next dev


> [email protected] prepare:data
> node gen/generate-chatgpt-by-category.js

ready - started server on 0.0.0.0:3000, url: http://localhost:3000
info  - Loaded env from /Volumes/source/ai/chat-flow/.env
warn  - You have enabled experimental feature (appDir) in next.config.js.
warn  - Experimental features are not covered by semver, and may cause unexpected or broken application behavior. Use at your own risk.

info  - Thank you for testing `appDir` please leave your feedback at https://nextjs.link/app-feedback
(node:8079) ExperimentalWarning: The Fetch API is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
event - compiled client and server successfully in 11.2s (262 modules)
wait  - compiling...
event - compiled client and server successfully in 1065 ms (262 modules)