Solved After reloading custom config, ItemStack[] not working as It should

hey, I save data about gifts to a config file. It is stored in ItemStack[]... when I do not reload it, It works perfectly fine but after reload of jar file & config It cannot read properly the ItemStack[]

My code for saving:

Code:

ItemStack[] cont = contents.toArray(new ItemStack[0]);
GiftDatabase.get().set(giftUUID + ".contents", cont);

My code for accessing:

Code:

ItemStack[] cont = (ItemStack[]) GiftDatabase.get().get(loreList.get(1) + ".contents");

World world = p.getWorld();

p.getInventory().remove(e.getItem());

for (ItemStack item : cont) {
System.out.println("OK");
if (p.getInventory().firstEmpty() == -1) {
world.dropItem(p.getLocation(), item);
} else {
p.getInventory().addItem(item);
}
}

The error after reload when accessing gift's contents:

[21:17:16] [Server thread/ERROR]: Could not pass event PlayerInteractEvent to Gifts v1.0-SNAPSHOT org.bukkit.event.EventException: null

 

Hey I found where the mistake is! It is in the storing it self! When storing ItemStack[] it is stored something like this: { something @ some random letters} but AFTER THE RELOAD it is stored like this: {ItemStack: Item...., ItemStack: Item...} or something like that idk right now so I used List of ItemStacks and that seems to fix it.