Fatal error: Uncaught yii\web\HeadersAlreadySentException: Headers already sent in C:\inetpub\wwwroot\tracking\vendor\yiisoft\yii2\web\Response.php on line 443. in C:\inetpub\wwwroot\tracking\vendor\yiisoft\yii2\web\Response.php:369
Stack trace:
#0 C:\inetpub\wwwroot\tracking\vendor\yiisoft\yii2\web\Response.php(342): yii\web\Response->sendHeaders()
#1 C:\inetpub\wwwroot\tracking\vendor\yiisoft\yii2\web\ErrorHandler.php(136): yii\web\Response->send()
#2 C:\inetpub\wwwroot\tracking\vendor\yiisoft\yii2\base\ErrorHandler.php(323): yii\web\ErrorHandler->renderException(Object(yii\base\ErrorException))
#3 [internal function]: yii\base\ErrorHandler->handleFatalError()
#4 {main}
thrown in C:\inetpub\wwwroot\tracking\vendor\yiisoft\yii2\web\Response.php on line 369
