1、iconv(): Detected an illegal character in input string
2、The 'gridview' module MUST be setup in your Yii configuration file.
3、Yii2 i18n
参考：
https://www.cnblogs.com/lxdd/p/3966892.html
https://www.cnblogs.com/fpcing/p/9394864.html
https://blog.csdn.net/wewelove/article/details/78853998