PHP Core Warning – yii\base\ErrorException

$_SERVER = [
    'PATH' => '/usr/local/bin:/bin:/usr/bin',
    'HTTP_ACCEPT' => '*/*',
    'HTTP_HOST' => 'katalogfirm.london',
    'HTTP_USER_AGENT' => 'Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)',
    'DOCUMENT_ROOT' => '/home/katfirm/domains/katalogfirm.london/private_html',
    'REMOTE_ADDR' => '18.217.67.16',
    'REMOTE_PORT' => '53589',
    'SERVER_ADDR' => '5.187.55.123',
    'SERVER_NAME' => 'katalogfirm.london',
    'SERVER_ADMIN' => 'webmaster@katalogfirm.london',
    'SERVER_PORT' => '443',
    'REQUEST_SCHEME' => 'https',
    'REQUEST_URI' => '/backend/web/site/loginuser',
    'REDIRECT_URL' => '/backend/web/site/loginuser',
    'REDIRECT_REQUEST_METHOD' => 'GET',
    'HTTPS' => 'on',
    'REDIRECT_STATUS' => '200',
    'X_SPDY' => 'HTTP2',
    'SSL_PROTOCOL' => 'TLSv1.3',
    'SSL_CIPHER' => 'TLS_AES_256_GCM_SHA384',
    'SSL_CIPHER_USEKEYSIZE' => '256',
    'SSL_CIPHER_ALGKEYSIZE' => '256',
    'SCRIPT_FILENAME' => '/home/katfirm/domains/katalogfirm.london/private_html/backend/web/index.php',
    'QUERY_STRING' => '',
    'SCRIPT_URI' => 'https://katalogfirm.london/backend/web/site/loginuser',
    'SCRIPT_URL' => '/backend/web/site/loginuser',
    'SCRIPT_NAME' => '/backend/web/index.php',
    'SERVER_PROTOCOL' => 'HTTP/1.1',
    'SERVER_SOFTWARE' => 'LiteSpeed',
    'REQUEST_METHOD' => 'GET',
    'X-LSCACHE' => 'on',
    'PHP_SELF' => '/backend/web/index.php',
    'REQUEST_TIME_FLOAT' => 1713588185.244905,
    'REQUEST_TIME' => 1713588185,
];

$_SESSION = [
    '__flash' => [],
];