Hello teacher! After running the demo2 and demo3 I downloaded, both prompts "Response failed 0". I don't know what it means? Trouble. Thanks!
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Screenshot the code, how do you know what is wrong without taking a screenshot of the code
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
