F12 is all open, why not check the preview on the right side of Headers, the error message will be displayed here
I guess the session is not open, go to the auto_start in the session.php file under the configuration directory config Change the item to auto_start =false
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Turn on PHP error reporting and then check again
When I watched the operation in the video, he did not introduce use think\session. Just write this.
F12 is all open, why not check the preview on the right side of Headers, the error message will be displayed here
I guess the session is not open, go to the auto_start in the session.php file under the configuration directory config Change the item to auto_start =false