An Error occurred while handling another error: yii\web\HeadersAlreadySentException: Headers already sent in /var/www/html/src/common/modules/library/views/default/view.php on line 120. in /var/www/html/src/vendor/yiisoft/yii2/web/Response.php:366 Stack trace: #0 /var/www/html/src/vendor/yiisoft/yii2/web/Response.php(339): yii\web\Response->sendHeaders() #1 /var/www/html/src/vendor/yiisoft/yii2/web/ErrorHandler.php(124): yii\web\Response->send() #2 /var/www/html/src/vendor/yiisoft/yii2/base/ErrorHandler.php(111): yii\web\ErrorHandler->renderException(Object(yii\web\HeadersAlreadySentException)) #3 [internal function]: yii\base\ErrorHandler->handleException(Object(yii\web\HeadersAlreadySentException)) #4 {main} Previous exception: yii\web\HeadersAlreadySentException: Headers already sent in /var/www/html/src/common/modules/library/views/default/view.php on line 120. in /var/www/html/src/vendor/yiisoft/yii2/web/Response.php:366 Stack trace: #0 /var/www/html/src/vendor/yiisoft/yii2/web/Response.php(339): yii\web\Response->sendHeaders() #1 /var/www/html/src/vendor/yiisoft/yii2/base/Application.php(392): yii\web\Response->send() #2 /var/www/html/src/frontend/web/index.php(28): yii\base\Application->run() #3 {main}