Fatal error: Uncaught yii\web\HeadersAlreadySentException: Headers already sent in /home/u51866/public_html/vendor/yiisoft/yii2/web/Response.php on line 428. in /home/u51866/public_html/vendor/yiisoft/yii2/web/Response.php:366
Stack trace:
#0 /home/u51866/public_html/vendor/yiisoft/yii2/web/Response.php(339): yii\web\Response->sendHeaders()
#1 /home/u51866/public_html/vendor/yiisoft/yii2/web/ErrorHandler.php(135): yii\web\Response->send()
#2 /home/u51866/public_html/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 /home/u51866/public_html/vendor/yiisoft/yii2/web/Response.php on line 366