An Error occurred while handling another error:
yii\base\InvalidArgumentException: Response content must not be an array. in /home/www/qianfan13/sapi/vendor/yiisoft/yii2/web/Response.php:1111
Stack trace:
#0 /home/www/qianfan13/sapi/vendor/yiisoft/yii2/web/Response.php(339): yii\web\Response->prepare()
#1 /home/www/qianfan13/sapi/vendor/yiisoft/yii2/web/ErrorHandler.php(136): yii\web\Response->send()
#2 /home/www/qianfan13/sapi/vendor/yiisoft/yii2/base/ErrorHandler.php(152): yii\web\ErrorHandler->renderException(Object(yii\base\InvalidArgumentException))
#3 [internal function]: yii\base\ErrorHandler->handleException(Object(yii\base\InvalidArgumentException))
#4 {main}
Previous exception:
yii\base\InvalidArgumentException: Response content must not be an array. in /home/www/qianfan13/sapi/vendor/yiisoft/yii2/web/Response.php:1111
Stack trace:
#0 /home/www/qianfan13/sapi/vendor/yiisoft/yii2/web/Response.php(339): yii\web\Response->prepare()
#1 /home/www/qianfan13/sapi/vendor/yiisoft/yii2/base/Application.php(415): yii\web\Response->send()
#2 /home/www/qianfan13/sapi/frontend/web/index.php(135): yii\base\Application->run()
#3 {main}