What to do if a 500 error occurs in yii2.0
1. First open web/index.php defined('YII_DEBUG') or define('YII_DEBUG', true); and change this to true; look at the error message:
Exception (Invalid Configuration) 'yii\base\InvalidConfigException' with message 'The directory is not writable by the Web process: /home/wwwroot/1XX.2X.XX3.X2/xhedu/backend/web/assets' in /home/wwwroot/12X.2X.XXX.1X/xhedu/vendor/yiisoft/yii2/web/AssetManager.php:213
2. The assets folder and its file permissions are insufficient, resulting in the inability to access AssetManager.php. Just change it to 777. The name of the owner and group of my previous project is www, and the permissions are the largest. 777; The user name of subsequent projects is root, and the permissions are not the highest. Therefore, you need to change the project assets folder to 777, and it will be fine.
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