i cant do working floating text

Hello, I want to do floating text in my server i worked on it i can spawn it but i cant Respawn it... I have trying to do it with other code in github
So It dont work....I specify im not a pro..
Code execute onJoin

PHP:

public function onPlayerJoin(PlayerJoinEvent $event){
    $pl = $event->getPlayer();
    $level= $event->getPlayer()->getLevel();
   $cfg = $this->config;
  $pos11 = $cfg->get("pos1");
    $pos22 = $cfg->get("pos2");
    $pos33 = $cfg->get("pos3");
    $pos44 = $cfg->get("pos4");
    $pos55 = $cfg->get("pos5");
    $pos66 = $cfg->get("pos6");
    $pos77 = $cfg->get("pos7");
    $pos88 = $cfg->get("pos8");
    $pos99 = $cfg->get("pos9");
   
   
    $text1 = $this->repl($cfg->get("text1"));
    $text2 = $this->repl($cfg->get("text2"));
    $text3 = $this->repl($cfg->get("text3"));
    $text4 = $cfg->get("text4");
    $text5 = $cfg->get("text5");
    $text6 = $cfg->get("text6");
    $text7 = $cfg->get("text7");
    $text8 = $cfg->get("text8");
    $text9 = $cfg->get("text9");
   
        $pos1 = new Vector3($pos11);
        $pos2 = new Vector3($pos22);
        $pos3 = new Vector3($pos33);
        $pos4 = new Vector3($pos44);  
        $pos5 = new Vector3($pos55);
        $pos6 = new Vector3($pos66);
        $pos7 = new Vector3($pos77);
        $pos8 = new vector3($pos88);
        $pos9 = new Vector3($pos99);
$this->ftp = array(

      1=> $level->addParticle(new FloatingTextParticle($pos1,$text1)),
      2=>  $level->addParticle(new FloatingTextParticle($pos2,$text2)),
      3=>  $level->addParticle(new FloatingTextParticle($pos3,$text3)),
      4=>$level->addParticle(new FloatingTextParticle($pos4->add(0.5, 0.0, 0.5),$text4)),
      5=>  $level->addParticle(new FloatingTextParticle($pos5->add(0.5, 0.0, 0.5),$text5)),
      6=> $level->addParticle(new FloatingTextParticle($pos6->add(0.5, 0.0, 0.5),$text6)),
       7=>    $level->addParticle(new FloatingTextParticle($pos7->add(0.5, 0.0, 0.5),$text7)),
      8=>  $level->addParticle(new FloatingTextParticle($pos8->add(0.5, 0.0, 0.5),$text8)),
      9=>   $level->addParticle(new FloatingTextParticle($pos9->add(0.5, 0.0, 0.5),$text9))
);
   }


Now that is executed in the event on chat

PHP:

            if(preg_match("/^!act$/",$mess)){
                $ev->setCancelled(true);
                if(empty($this->ftp)) return $sender->sendMessage("empty");
                for($i=1; $i<10; $i++){
                $this->ftp[$i]->setInvisible(false); //193
                }$player->sendMessage("reactivated");
                }


The error [Server thread/CRITICAL]: Error: "Call to a member function setInvisible() on null" (EXCEPTION) in "EnkoraCore/src/enkora/Main" at line 193
Thanks for your help and im not a pro

 

I think, that you need add FloatingTextParticle class to $this->ftp, but no null
Function 'addParticle' return null

Spoiler: Level::addParticle()

PHP:

    public function addParticle(Particle $particle, array $players = null){
        $pk = $particle->encode();
        if($players === null){
            if($pk !== null){
                if(!is_array($pk)){
                    $this->addChunkPacket($particle->x >> 4, $particle->z >> 4, $pk);
                }else{
                    foreach($pk as $e){
                        $this->addChunkPacket($particle->x >> 4, $particle->z >> 4, $e);
                    }
                }
            }
        }else{
            if($pk !== null){
                if(!is_array($pk)){
                    $this->server->broadcastPacket($players, $pk);
                }else{
                    $this->server->batchPackets($players, $pk, false);
                }
            }
        }
    }

Spoiler: Something like this

PHP:

$this->ftp = array(
      1=> new FloatingTextParticle($pos1,$text1),
      2=> new FloatingTextParticle($pos2,$text2),
      3=> new FloatingTextParticle($pos3,$text3),
      ...
);
foreach ($this->ftp as $particle) {
    $level->addParticle($particle);
}