TypeError 

  Symfony\Component\HttpFoundation\IpUtils::checkIp4(): Argument #2 ($ip) must be of type string, null given, called in /home/estackly/estacklymain/vendor/symfony/http-foundation/IpUtils.php on line 59

  at estacklymain/vendor/symfony/http-foundation/IpUtils.php:75
     71▕      * @param string $ip IPv4 address or subnet in CIDR notation
     72▕      *
     73▕      * @return bool Whether the request IP matches the IP, or whether the request IP is within the CIDR subnet
     74▕      */
  ➜  75▕     public static function checkIp4(string $requestIp, string $ip): bool
     76▕     {
     77▕         $cacheKey = $requestIp.'-'.$ip.'-v4';
     78▕         if (null !== $cacheValue = self::getCacheResult($cacheKey)) {
     79▕             return $cacheValue;

      +11 vendor frames 

  12  public_html/index.php:20
      Illuminate\Foundation\Application::handleRequest()
  13  public_html/sitemap.php:5