error

[SuperAdam47]

[17:28:07] [Server thread/INFO]: Enabling BossBarAPI v1.0.0
[17:28:07] [Server thread/CRITICAL]: Error: "Call to undefined method pocketmine\network\Network::registerPacket()" (EXCEPTION) in "BossBarAPI-master/src/PocketEssential/BossBarAPI/BossBarAPI" at line 56
[17:28:07] [Server thread/DEBUG]: #0 src/pocketmine/plugin/PluginBase(111): PocketEssential\BossBarAPI\BossBarAPI->onEnable()
[17:28:07] [Server thread/DEBUG]: #1 src/pocketmine/plugin/PluginManager(422): pocketmine\plugin\PluginBase->setEnabled(boolean 1)
[17:28:07] [Server thread/DEBUG]: #2 src/pocketmine/Server(2156): pocketmine\plugin\PluginManager->enablePlugin(PocketEssential\BossBarAPI\BossBarAPI object)
[17:28:07] [Server thread/DEBUG]: #3 src/pocketmine/Server(2142): pocketmine\Server->enablePlugin(PocketEssential\BossBarAPI\BossBarAPI object)
[17:28:07] [Server thread/DEBUG]: #4 src/pocketmine/Server(1882): pocketmine\Server->enablePlugins(integer 1)
[17:28:07] [Server thread/DEBUG]: #5 src/pocketmine/PocketMine(246): pocketmine\Server->__construct(BaseClassLoader object, pocketmine\utils\MainLogger object, string C:\Users\aronf\Desktop\yedeksetup\test sunucu, string C:\Users\aronf\Desktop\yedeksetup\test sunucu\plugins)
[17:28:07] [Server thread/DEBUG]: #6 C:/Users/aronf/Desktop/yedeksetup/test sunucu/PocketMine-MP.phar(1): require_once(string phar://C:/Users/aronf/Desktop/yedeksetup/test sunucu/PocketMine-MP.phar/src/pocketmine/PocketMine.php)