An Error occurred while handling another error:
yii\web\HeadersAlreadySentException: Headers already sent in /app/config/params.php on line 161. 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\base\ErrorException))
#3 [internal function]: yii\base\ErrorHandler->handleException(Object(yii\base\ErrorException))
#4 {main}
Previous exception:
yii\base\ErrorException: session_set_cookie_params(): Cannot change session cookie parameters when headers already sent in /app/vendor/yiisoft/yii2/web/Session.php:429
Stack trace:
#0 [internal function]: yii\base\ErrorHandler->handleError(2, 'session_set_coo...', '/app/vendor/yii...', 429, Array)
#1 /app/vendor/yiisoft/yii2/web/Session.php(429): session_set_cookie_params(Array)
#2 /app/vendor/yiisoft/yii2/web/Session.php(147): yii\web\Session->setCookieParamsInternal()
#3 /app/vendor/yiisoft/yii2/web/Session.php(699): yii\web\Session->open()
#4 /app/vendor/yiisoft/yii2/web/Session.php(791): yii\web\Session->get('__flash', Array)
#5 /app/widgets/Alert.php(57): yii\web\Session->getFlash('error')
#6 /app/vendor/yiisoft/yii2/base/Widget.php(146): app\widgets\Alert->run()
#7 /app/views/layouts/main.php(66): yii\base\Widget::widget()
#8 /app/vendor/yiisoft/yii2/base/View.php(347): require('/app/views/layo...')
#9 /app/vendor/yiisoft/yii2/base/View.php(257): yii\base\View->renderPhpFile('/app/views/layo...', Array)
#10 /app/vendor/yiisoft/yii2/base/Controller.php(422): yii\base\View->renderFile('/app/views/layo...', Array, Object(app\controllers\SiteController))
#11 /app/vendor/yiisoft/yii2/base/Controller.php(408): yii\base\Controller->renderContent('<div class="sit...')
#12 /app/controllers/SiteController.php(66): yii\base\Controller->render('index')
#13 [internal function]: app\controllers\SiteController->actionIndex()
#14 /app/vendor/yiisoft/yii2/base/InlineAction.php(57): call_user_func_array(Array, Array)
#15 /app/vendor/yiisoft/yii2/base/Controller.php(178): yii\base\InlineAction->runWithParams(Array)
#16 /app/vendor/yiisoft/yii2/base/Module.php(552): yii\base\Controller->runAction('', Array)
#17 /app/vendor/yiisoft/yii2/web/Application.php(103): yii\base\Module->runAction('', Array)
#18 /app/vendor/yiisoft/yii2/base/Application.php(384): yii\web\Application->handleRequest(Object(yii\web\Request))
#19 /app/web/index.php(12): yii\base\Application->run()
#20 {main}