Error

PHP Noticeyii\base\ErrorException

Trying to get property 'slug' of non-object

$_GET = [
    'parent' => 'ongoing',
];

$_SERVER = [
    'REDIRECT_HTTPS' => 'on',
    'REDIRECT_SSL_TLS_SNI' => 'www.cer.uz',
    'REDIRECT_STATUS' => '200',
    'HTTPS' => 'on',
    'SSL_TLS_SNI' => 'www.cer.uz',
    'HTTP_ACCEPT' => '*/*',
    'HTTP_USER_AGENT' => 'claudebot',
    'HTTP_REFERER' => 'http://www.cer.uz/en/projects/ongoing',
    'HTTP_HOST' => 'www.cer.uz',
    'PATH' => '/usr/bin:/bin',
    'SERVER_SIGNATURE' => '
Apache/2.4.38 (Debian) Server at www.cer.uz Port 443
', 'SERVER_SOFTWARE' => 'Apache/2.4.38 (Debian)', 'SERVER_NAME' => 'www.cer.uz', 'SERVER_ADDR' => '172.21.21.52', 'SERVER_PORT' => '443', 'REMOTE_ADDR' => '44.197.251.102', 'DOCUMENT_ROOT' => '/var/www/new.cer.uz', 'REQUEST_SCHEME' => 'https', 'CONTEXT_PREFIX' => '', 'CONTEXT_DOCUMENT_ROOT' => '/var/www/new.cer.uz', 'SERVER_ADMIN' => 'webmaster@localhost', 'SCRIPT_FILENAME' => '/var/www/new.cer.uz/index.php', 'REMOTE_PORT' => '53294', 'REDIRECT_URL' => '/en/projects/ongoing', 'GATEWAY_INTERFACE' => 'CGI/1.1', 'SERVER_PROTOCOL' => 'HTTP/1.1', 'REQUEST_METHOD' => 'GET', 'QUERY_STRING' => '', 'REQUEST_URI' => '/en/projects/ongoing', 'SCRIPT_NAME' => '/index.php', 'PHP_SELF' => '/index.php', 'REQUEST_TIME_FLOAT' => 1710836188.055924, 'REQUEST_TIME' => 1710836188, ];

Warning: session_set_cookie_params(): Cannot change session cookie parameters when headers already sent in /var/www/new.cer.uz/vendor/yiisoft/yii2/web/Session.php on line 343