How do I set blocks in void levels?

So I generated a void type of a world which means there are absolutely no other blocks in it but only air in the first place. I tried generating a structure at some coordinates using $level->setBlock($pos, $block) where $level is an instance of Level, $pos is an instance of Vector3 and $block is an instance of Block. This code does not give any errors but it is just not generating the block in the world. Help please

 

Are you sure you have put a block from 1 to 255?

If yes, give us your code. This may help us to find out what is going wrong...

 

This is my code :

PHP:

        for ($x = $coords['x'] - $size; $x <= $coords['x'] + $size; $x++)
        {
            for ($z = $coords['z'] - $size; $z <= $coords['z'] + $size; $z++)
            {
                $level->setBlock(new Vector3($x, $coords['y'], $z), Block::get(2));
                for($y = $coords['y'] - 1; $y >= $coords['y'] - $size; $y--)
                {
                    $level->setBlock(new Vector3($x, $y, $z), Block::get(3));
                }
            }
        }


There

 

what about

PHP:

$x=2
$y=43
$z=134
$level->setBlock(new Vector3($x, $y, $z), Block::get(3));

 

That is not the issue I have. $coords['x'], $coords['y'] and $coords['z'] are all instance of int. The player is even being teleported later on to these coordinates without a problem. I assure you, the problem is not in the coordinates.

 

It says the block is being generated at the specified random coordinates, however when I go to these coordinates, there is nothing there except air

 

Okay this makes absolutely no sense. I did debug, everything is ok. $level->setBlock() just doesn't set the block. I didn't have such issues on a normal world

Edit: (can someone move this outside of facepalm? I accidently placed it here lol)

 

After Placing the blocks try go to another world and back Maybe it will be there then

 

Send the output of var_dump(get_class($level));

 

string(22) "pocketmine\level\Level"