You can only send a Tip to a player. Also it is an event, use PHP: public function onJoin(PlayerJoinEvent $event){$player = $event->getPlayer();$player->sendTip("Your-Tip");} Of course you have to use/import PlayerJoinEvent.
this.. PHP: $this->getServer()->getScheduler()->scheduleRepeatingTask(new CallbackTask([$this,"onJoin"]),10); and this... PHP: public function onJoin() { $p = $this->getServer()->getOnlinePlayers(); $p->sendTip("Welcome To Savion's Test Server!!!"); }
Wat $p will become an array. And you are trying to send it to everyone? And who do you want to send that message to? Why did you use a repeating task?