The only supported ciphers are AES-128-CBC and AES-256-CBC with the correct

Laravel 出现"RuntimeException inEncrypter.php line 43: The only supported ciphers are AES-128-CBC and AES-256-CBC with the correct key lengths."问题的解决办法
首先在cmd命令行下定位到项目所在的根目录下，接着输入：

php artisan key:generate

效果：

 这时候项目根目录下的.env文件里的APP_KEY应该会有值了：

 若没有，则将上一步生成的key值输入进去即可。

采摘自：https://blog.csdn.net/u013049553/article/details/52608353

The only supported ciphers are AES-128-CBC and AES-256-CBC with the correct

原文：https://www.cnblogs.com/aididiao/p/12757087.html