Err: HException: "Item not found!"

[NhanAZ]

[09:40:57.868] [Server thread/CRITICAL]: thebigcrafter\Hydrogen\exceptions\HException: "Item not found!" (EXCEPTION) in "pmsrc/virions/Hydrogen/src/thebigcrafter/Hydrogen/utils/StringConverter" at line 29
--- Stack trace ---
  #0 plugins/KygekPotionDisabler/src/KygekTeam/KygekPotionDisabler/PotionDisabler(84): thebigcrafter\Hydrogen\utils\StringConverter::stringToItem(int 20166, int 0)
  #1 plugins/KygekPotionDisabler/src/KygekTeam/KygekPotionDisabler/PotionDisabler(50): KygekTeam\KygekPotionDisabler\PotionDisabler->removePotionFromCreativeInventory()
  #2 pmsrc/src/plugin/PluginBase(119): KygekTeam\KygekPotionDisabler\PotionDisabler->onEnable()
  #3 pmsrc/src/plugin/PluginManager(454): pocketmine\plugin\PluginBase->onEnableStateChange(true)
  #4 pmsrc/src/Server(1389): pocketmine\plugin\PluginManager->enablePlugin(object KygekTeam\KygekPotionDisabler\PotionDisabler#41633)
  #5 pmsrc/src/Server(1033): pocketmine\Server->enablePlugins(object pocketmine\plugin\PluginEnableOrder#41601)
  #6 pmsrc/src/PocketMine(334): pocketmine\Server->__construct(object pocketmine\thread\ThreadSafeClassLoader#6, object pocketmine\utils\MainLogger#3, string[47] C:\Users\NhanAZ\Documents\Github\PocketMine-MP\, string[55] C:\Users\NhanAZ\Documents\Github\PocketMine-MP\plugins\)
  #7 pmsrc/src/PocketMine(357): pocketmine\server()
--- End of exception information ---
[09:40:57.870] [Server thread/EMERGENCY]: An unrecoverable error has occurred and the server has crashed. Creating a crash dump
[09:40:57.880] [Server thread/EMERGENCY]: Please upload the "C:/Users/NhanAZ/Documents/Github/PocketMine-MP/crashdumps/Tue_Aug_15-09.40.57-UTC_2023.log" file to the Crash Archive and submit the link to the Bug Reporting page. Give as much info as you can.
[09:40:57.881] [Server thread/EMERGENCY]: Forcing server shutdown