An Error occurred while handling another error:
yii\web\HeadersAlreadySentException: Headers already sent in /var/www/html/sigobweb/controllers/ctacte/ConvmultiController.php on line 28. in /var/www/html/vendor/yiisoft/yii2/web/Response.php:373
Stack trace:
#0 /var/www/html/vendor/yiisoft/yii2/web/Response.php(346): yii\web\Response->sendHeaders()
#1 /var/www/html/vendor/yiisoft/yii2/web/ErrorHandler.php(136): yii\web\Response->send()
#2 /var/www/html/vendor/yiisoft/yii2/base/ErrorHandler.php(135): yii\web\ErrorHandler->renderException()
#3 [internal function]: yii\base\ErrorHandler->handleException()
#4 {main}
Previous exception:
yii\web\HeadersAlreadySentException: Headers already sent in /var/www/html/sigobweb/controllers/ctacte/ConvmultiController.php on line 28. in /var/www/html/vendor/yiisoft/yii2/web/Response.php:373
Stack trace:
#0 /var/www/html/vendor/yiisoft/yii2/web/Response.php(346): yii\web\Response->sendHeaders()
#1 /var/www/html/vendor/yiisoft/yii2/base/Application.php(398): yii\web\Response->send()
#2 /var/www/html/sigobweb/index.php(29): yii\base\Application->run()
#3 {main}