[Solved] Keys cannot be strings in Remote Events?

I am currently getting this error keys must be strings from

for _,plr in pairs(arena.players) do
	local playerTable = client.getPlayerTable(p);
	locations.re.played:FireClient(plr.player, playerTable, tonumber(position), card);
end

Why could this happen? plr.player is the player userdata playerTable is just information about the player position is a number card is another table about a card

client.getPlayerTable(p);

function client.getPlayerTable(p)
	local playerTable = {
			player = p.player;
			health = p.health;
			name = p.name;
			userId = p.userId;
			Board = p.Board;
			Avatar = p.Avatar;
			field = p.field;
	};
	return playerTable;
end

player is just the player object health is a number name is name of the player object userid is the player's userid board is just a string identifying the board same with avatar field is a table of cards in the player's field

Cannot send functions through RemoteEvents :P