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An Error occurred while handling another error:
yii\web\HeadersAlreadySentException: Headers already sent in /home/c112990/proatribut.ru/yii/app/filters/CitiesSource.php on line 55. in /home/c112990/proatribut.ru/yii/vendor/yiisoft/yii2/web/Response.php:369
Stack trace:
#0 /home/c112990/proatribut.ru/yii/vendor/yiisoft/yii2/web/Response.php(342): yii\web\Response->sendHeaders()
#1 /home/c112990/proatribut.ru/yii/vendor/yiisoft/yii2/web/ErrorHandler.php(136): yii\web\Response->send()
#2 /home/c112990/proatribut.ru/yii/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: Cannot modify header information - headers already sent by (output started at /home/c112990/proatribut.ru/yii/app/filters/CitiesSource.php:55) in /home/c112990/proatribut.ru/yii/app/filters/CitiesSource.php:57
Stack trace:
#0 [internal function]: yii\base\ErrorHandler->handleError(2, 'Cannot modify h...', '/home/c112990/p...', 57, Array)
#1 /home/c112990/proatribut.ru/yii/app/filters/CitiesSource.php(57): header('HTTP/1.0 403 Fo...')
#2 /home/c112990/proatribut.ru/yii/vendor/yiisoft/yii2/base/ActionFilter.php(77): app\filters\CitiesSource->beforeAction(Object(yii\base\InlineAction))
#3 [internal function]: yii\base\ActionFilter->beforeFilter(Object(yii\base\ActionEvent))
#4 /home/c112990/proatribut.ru/yii/vendor/yiisoft/yii2/base/Component.php(648): call_user_func(Array, Object(yii\base\ActionEvent))
#5 /home/c112990/proatribut.ru/yii/vendor/yiisoft/yii2/base/Controller.php(303): yii\base\Component->trigger('beforeAction', Object(yii\base\ActionEvent))
#6 /home/c112990/proatribut.ru/yii/vendor/yiisoft/yii2/web/Controller.php(318): yii\base\Controller->beforeAction(Object(yii\base\InlineAction))
#7 /home/c112990/proatribut.ru/yii/vendor/yiisoft/yii2/base/Controller.php(182): yii\web\Controller->beforeAction(Object(yii\base\InlineAction))
#8 /home/c112990/proatribut.ru/yii/vendor/yiisoft/yii2/base/Module.php(555): yii\base\Controller->runAction('sitemap', Array)
#9 /home/c112990/proatribut.ru/yii/vendor/yiisoft/yii2/web/Application.php(103): yii\base\Module->runAction('site/sitemap', Array)
#10 /home/c112990/proatribut.ru/yii/vendor/yiisoft/yii2/base/Application.php(387): yii\web\Application->handleRequest(Object(yii\web\Request))
#11 /home/c112990/proatribut.ru/yii/web/index.php(23): yii\base\Application->run()
#12 {main}