Проверка наличия МЧД

Тип заявителя и группы доверяемых полномочий
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* Поля, обязательные для заполнения

An Error occurred while handling another error:
yii\web\HeadersAlreadySentException: Headers already sent in /var/www/html/vendor/yiisoft/yii2/web/Response.php on line 443. in /var/www/html/vendor/yiisoft/yii2/web/Response.php:369
Stack trace:
#0 /var/www/html/vendor/yiisoft/yii2/web/Response.php(342): 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(152): yii\web\ErrorHandler->renderException()
#3 [internal function]: yii\base\ErrorHandler->handleException()
#4 {main}
Previous exception:
yii\base\ErrorException: session_set_cookie_params(): Session cookie parameters cannot be changed after headers have already been sent in /var/www/html/vendor/yiisoft/yii2/web/Session.php:429
Stack trace:
#0 /var/www/html/vendor/yiisoft/yii2/web/Session.php(429): yii\web\ErrorHandler->handleError(code: '...', message: '...', file: '...', line: '...')
#1 /var/www/html/vendor/yiisoft/yii2/web/Session.php(429): ::session_set_cookie_params(lifetime_or_options: '...')
#2 /var/www/html/vendor/yiisoft/yii2/web/Session.php(147): yii\web\Session->setCookieParamsInternal()
#3 /var/www/html/vendor/yiisoft/yii2/web/Session.php(711): yii\web\Session->open()
#4 /var/www/html/components/LastThreeUri.php(52): yii\web\Session->set(key: '...', value: '...')
#5 /var/www/html/components/LastThreeUri.php(21): app\components\LastThreeUri->saveInSession(url: '...')
#6 /var/www/html/index.php(37): app\components\LastThreeUri->saveUri(url: '...')
#7 {main}