Database script to fix {"success":false,"error":{"code":"result is not an object","message":"result is not an object"}} error on vTiger Crm

user_error_fix.php

<?php
/**
 * This file fixes an issue on vTiger.
 *
 * The issue relates to having a missing 'is_owner'
 * column in 'vtiger_users' database table.
 *
 */

# Fill in the database connection details

$host = 'localhost';
$port = 33060; // Possibly 3306 on your server
$username = 'homestead';
$password = 'secret';
$dbName = 'vtiger';

# Place this file in a (1) web accessible directory or the root of your (2)
# vTiger Installation.
### Note ## The file needs to be on the same server as the vTiger database
# or else change the $host setting above. Delete this file from all servers
# once done.

# (1) If you've placed this file in a web accessible web server than simply
# point the browser to it and the fix is completed.

# (2) If you've laced this in vTiger root directory, ssh into the directory
# and type the the following command `php user_error_fix.php`. The terminal will let
# inform you if the fix was applied.


###### The Code Below Can Be Ignored - This is used to run the fix #####

// Initiate a connection to the database
$connection = new mysqli($host, $username, 'some', $dbName, $port);

/**
 * @return int|mysqli
 */
$connect = function() use ($connection) {
    if ($connection->connect_error) {
        return print "  Cannot connect to database. Please review your settings  ";
    }
    return $connection;
};

/**
 * @return bool
 */
$test = function() use ($connect) {
    $query = "SHOW COLUMNS FROM vtiger_users LIKE = 'is_owner'";
    $result = mysqli_query($connect(), $query);

    if (!$result == false) {
        if (mysqli_num_rows($result) > 0) {
            return false;
        }
    } else {
        return true;
    }

    return true;
};


/**
 * @return bool|mysqli_result
 */
$action = function() use ($connect) {
    $query = "ALTER TABLE vtiger_users ADD is_owner VARCHAR (10)";
    return mysqli_query($connect(), $query);
};


/**
 * @return int
 */
$runFix = function() use ($test, $action){
    if($test()){
        if ($action()) {
            return print "  Good job :) :)  ";
        }
    }

    return print "  Column already exists  ";
};

/**
 *  Run the fix.
 */
$runFix();

Hi,

could you please let me which directory should this file be copied to and how to make it work ?
I'm a newbie in this and I would appreciate the advice.

Thanks