PHP Core Warning – yii\base\ErrorException

$_GET = [
    'slug' => 'hakkimizda',
];

$_SERVER = [
    'USER' => 'guvubcom',
    'HOME' => '/home/guvubcom',
    'FCGI_ROLE' => 'RESPONDER',
    'REDIRECT_REDIRECT_UNIQUE_ID' => 'aTzBpIcAak5C9POO_iQ1JgAAAMA',
    'REDIRECT_REDIRECT_STATUS' => '200',
    'REDIRECT_UNIQUE_ID' => 'aTzBpIcAak5C9POO_iQ1JgAAAMA',
    'REDIRECT_STATUS' => '200',
    'UNIQUE_ID' => 'aTzBpIcAak5C9POO_iQ1JgAAAMA',
    'proxy-nokeepalive' => '1',
    'HTTP_ACCEPT' => '*/*',
    'HTTP_USER_AGENT' => 'Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)',
    'HTTP_ACCEPT_ENCODING' => 'gzip, br, zstd, deflate',
    'HTTP_HOST' => 'www.guvercinclub.com',
    'HTTP_VIA' => '1.1 squid-proxy-5b5d847c96-nhd4j (squid/6.13)',
    'HTTP_X_FORWARDED_FOR' => '10.8.59.74',
    'HTTP_CACHE_CONTROL' => 'max-age=259200',
    'HTTP_CONNECTION' => 'keep-alive',
    'PATH' => '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin',
    'SERVER_SIGNATURE' => '',
    'SERVER_SOFTWARE' => 'Apache/2',
    'SERVER_NAME' => 'www.guvercinclub.com',
    'SERVER_ADDR' => '89.107.229.220',
    'SERVER_PORT' => '80',
    'REMOTE_ADDR' => '216.73.216.217',
    'DOCUMENT_ROOT' => '/home/guvubcom/domains/guvercinclub.com/public_html',
    'REQUEST_SCHEME' => 'http',
    'CONTEXT_PREFIX' => '',
    'CONTEXT_DOCUMENT_ROOT' => '/home/guvubcom/domains/guvercinclub.com/public_html',
    'SERVER_ADMIN' => 'webmaster@guvercinclub.com',
    'SCRIPT_FILENAME' => '/home/guvubcom/domains/guvercinclub.com/public_html/web/index.php',
    'REMOTE_PORT' => '42410',
    'REDIRECT_URL' => '/web/sayfa/hakkimizda',
    'GATEWAY_INTERFACE' => 'CGI/1.1',
    'SERVER_PROTOCOL' => 'HTTP/1.1',
    'REQUEST_METHOD' => 'GET',
    'QUERY_STRING' => '',
    'REQUEST_URI' => '/sayfa/hakkimizda',
    'SCRIPT_NAME' => '/web/index.php',
    'PHP_SELF' => '/web/index.php',
    'REQUEST_TIME_FLOAT' => 1765589412.3747749,
    'REQUEST_TIME' => 1765589412,
];