AUTHENTICATION

An Error occurred while handling another error:
yii\web\HeadersAlreadySentException: Headers already sent in /app/common/config/auth.php on line 32. in /app/vendor/yiisoft/yii2/web/Response.php:369
Stack trace:
#0 /app/vendor/yiisoft/yii2/web/Response.php(342): yii\web\Response->sendHeaders()
#1 /app/vendor/yiisoft/yii2/web/ErrorHandler.php(136): yii\web\Response->send()
#2 /app/vendor/yiisoft/yii2/base/ErrorHandler.php(152): 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 /app/common/config/auth.php on line 32. in /app/vendor/yiisoft/yii2/web/Response.php:369
Stack trace:
#0 /app/vendor/yiisoft/yii2/web/Response.php(342): yii\web\Response->sendHeaders()
#1 /app/vendor/yiisoft/yii2/base/Application.php(659): yii\web\Response->send()
#2 /app/webapp/components/Bootstrap.php(49): yii\base\Application->end()
#3 /app/vendor/yiisoft/yii2/base/Application.php(325): app\components\Bootstrap->bootstrap(Object(trdx\web\Application))
#4 /app/vendor/yiisoft/yii2/web/Application.php(69): yii\base\Application->bootstrap()
#5 /app/vendor/yiisoft/yii2/base/Application.php(271): yii\web\Application->bootstrap()
#6 /app/extensions/xii/web/Application.php(54): yii\base\Application->init()
#7 /app/extensions/trdx/web/Application.php(66): xii\web\Application->init()
#8 /app/vendor/yiisoft/yii2/base/BaseObject.php(109): trdx\web\Application->init()
#9 /app/vendor/yiisoft/yii2/base/Application.php(204): yii\base\BaseObject->__construct(Array)
#10 /app/extensions/xii/traits/ApplicationExtendTrait.php(56): yii\base\Application->__construct(Array)
#11 /app/extensions/trdx/traits/ApplicationExtendTrait.php(20): xii\web\Application->__construct(Array)
#12 /app/extensions/xii/Xii.php(125): trdx\web\Application->__construct(Array)
#13 /app/webapp/web/index.php(32): Xii::createWebApplication('/app/webapp/con...', Array)
#14 {main}