An Error occurred while handling another error:
exception 'yii\web\HeadersAlreadySentException' with message 'Headers already sent in /home/e-create/github/hydra/public/frontend/actions/CategoryAction.php on line 15.' in /home/e-create/github/hydra/public/vendor/yiisoft/yii2/web/Response.php:366
Stack trace:
#0 /home/e-create/github/hydra/public/vendor/yiisoft/yii2/web/Response.php(339): yii\web\Response->sendHeaders()
#1 /home/e-create/github/hydra/public/vendor/yiisoft/yii2/web/ErrorHandler.php(135): yii\web\Response->send()
#2 /home/e-create/github/hydra/public/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:
exception 'yii\web\HeadersAlreadySentException' with message 'Headers already sent in /home/e-create/github/hydra/public/frontend/actions/CategoryAction.php on line 15.' in /home/e-create/github/hydra/public/vendor/yiisoft/yii2/web/Response.php:366
Stack trace:
#0 /home/e-create/github/hydra/public/vendor/yiisoft/yii2/web/Response.php(339): yii\web\Response->sendHeaders()
#1 /home/e-create/github/hydra/public/vendor/yiisoft/yii2/base/Application.php(392): yii\web\Response->send()
#2 /home/e-create/github/hydra/public/frontend/web/index.php(18): yii\base\Application->run()
#3 {main}