Lab doen't work, with unclear reason

[WedLauren00]

After setting up lab with the following steps
https://www.kalilinux.in/2021/09/how-to-setup-sql-injection-labs-kali-linux.html
Got to mention that I use an edited version of repository
(https://github.com/Rinkish/Sqli_Edited_Version)
But I hope that community of "sqli-labs" ius much wider, and asking for help from you (issue is duplicated on the Rinkish's repo). So, setup-db.php seems to be OK, after pressing "Setup/reset Database for labs" everything is normal, no errors, but when I open up First lesson (as well as second, third and I guess every lesson) and trying to insert different id parameters I see no changes.
http://127.0.0.1/sqli/Less-1/?id=1 leads to the same result as if id=2.
Welcome Dhakkan and nothing more.

I tried to inspect the responsible code

$sql="SELECT * FROM users WHERE id='$id' LIMIT 0,1";
$result=mysqli_query($con, $sql);
$row = mysqli_fetch_array($result, MYSQLI_BOTH);

$sql="SELECT * FROM users WHERE id='$id' LIMIT 0,1";
$result=mysqli_query($con, $sql);
$row = mysqli_fetch_array($result, MYSQLI_BOTH);

    if($row)
    {
    echo "<font size='5' color= '#99FF00'>";
    echo 'Your Login name:'. $row['username'];
    echo "<br>";
    echo 'Your Password:' .$row['password'];
    echo "</font>";
    }
    else 
    {
    echo '<font color= "#FFFF00">';
    print_r(mysqli_error($con));
    echo "</font>";  
    }

So Your Login name and Your Password doesn't present, may be $row is false, IDK.
apache2 and mysql services are started. I will be glad to hear any hints. Thanks in advance.