fatal error: uncaught yii\web\headersalreadysentexception: headers already sent in /www/wwwroot/www.xiaoyulianai.com/vendor/yiisoft/yii2/filters/pagecache.php on line 260. in /www/wwwroot/www.xiaoyulianai.com/vendor/yiisoft/yii2/web/response.php:366
stack trace:
#0 /www/wwwroot/www.xiaoyulianai.com/vendor/yiisoft/yii2/web/response.php(339): yii\web\response->sendheaders()
#1 /www/wwwroot/www.xiaoyulianai.com/vendor/yiisoft/yii2/web/errorhandler.php(136): yii\web\response->send()
#2 /www/wwwroot/www.xiaoyulianai.com/vendor/yiisoft/yii2/base/errorhandler.php(262): yii\web\errorhandler->renderexception(object(yii\base\errorexception))
#3 [internal function]: yii\base\errorhandler->handlefatalerror()
#4 {main}
thrown in /www/wwwroot/www.xiaoyulianai.com/vendor/yiisoft/yii2/web/response.php on line 366
