Do you know why it is an error on the host but not on localhost my pc?

Question

On my regular computer this works fine, but on my host, which is hostgator, I keep getting this fatal error. it's saying the undefined function mysqli_stmt_get_result()

fatal error: Uncaught Error: Call to undefined function mysqli_stmt_get_result() in /home2/joe773/myblogs.live/loginSocialMediaPosts/includes/login.php:17 Stack trace: #0 {main} thrown in /home2/joe773/myblogs.live/loginSocialMediaPosts/includes/login.php on line 17

if(isset($_POST['login-submit'])) {
   require "../config/db.php";
    $unameEmail = $_POST['unameEmail'];
    $password = $_POST['pwd'];

    $sql = "SELECT * FROM users WHERE username=? OR email=?; "; 
    $stmt = mysqli_stmt_init($conn);
    if(!mysqli_stmt_prepare($stmt, $sql)) {
    header("Location: ../index.php?error=sqlerror");
    }else{
        mysqli_stmt_bind_param($stmt, "ss", $unameEmail, $unameEmail);
    mysqli_stmt_execute($stmt); 
        $result = mysqli_stmt_get_result($stmt);
        if($row = mysqli_fetch_assoc($result)) {
        $pwdCheck = password_verify($password, $row['password']);
        if($pwdCheck == false) {
            header("Location: ../index.php?error=wrongPassword");
            exit(); 
            }elseif($pwdCheck == true) {
                session_start();
                $_SESSION['userId'] = $row['id'];
                $_SESSION['username'] = $row['username'];
                header("Location: ../index.php?login=success");
            }


    }else{
        header('Location: ../index.php?error=wrongPassword');
    }
}

}