Getting this error in the below code >> Fatal error: Uncaught ArgumentCountError:

Getting this error in the below code

Warning: Cannot modify header information – headers already sent by (output started at /home/kvkprose/public_html/index.php:48) in /home/kvkprose/public_html/header.php on line 15

Warning: Cannot modify header information – headers already sent by (output started at /home/kvkprose/public_html/index.php:48) in /home/kvkprose/public_html/header.php on line 16

Warning: Cannot modify header information – headers already sent by (output started at /home/kvkprose/public_html/index.php:48) in /home/kvkprose/public_html/header.php on line 17

Warning: Cannot modify header information – headers already sent by (output started at /home/kvkprose/public_html/index.php:48) in /home/kvkprose/public_html/header.php on line 18

$connection = new mysqli("127.0.0.1","*******","******","*********");

if ($connection->connect_error) 
{
    die("Connection failed: " . $connection->connect_error);
}

function exe_query($conn, $query) 
{ 
  $result = mysqli_query($conn, $query); 

  if (!$result) 
  { 
    die("Query failed: " . mysqli_error($conn)); 
  }

  $rows = [];
  while ($row = mysqli_fetch_assoc($result))
  { 
    $rows[] = $row; 
  }

  return $rows; 
}


$company_data=exe_query($connection, "select * from tbl_admin");
 $contact_data=exe_query($connection,"select * from tbl_contact");
 $about_data=exe_query($connection,"select * from tbl_about where id=3");
 $social_data=exe_query($connection,"select * from tbl_social where id=1");
        $full_name  = $_SERVER['PHP_SELF'];
        $name_array = explode('/',$full_name);
        $count      = count($name_array);
        $page_name  = $name_array[$count-1];


        header("Strict-Transport-Security:max-age=63072000");
        header("X-XSS-Protection: 1; mode=block");
        header('X-Content-Type-Options: nosniff');
        header("Expect-CT: enforce; max-age=30; report-uri='**********");

        $mypage=explode(".",$page_name);