public static void setBooleanOnServerAndSync(Player p, String key, boolean value, boolean temporary) {
        p.getCapability(PlayerDataProvider.PLAYER_DATA, null).ifPresent(playerData -> {
            playerData.setBoolean(key, value, temporary);
            Messages.sendToPlayer(SyncPlayerDataPacket.toClient(key).setBoolean(value), (ServerPlayer) p); //It fails here
            if (value) {
                ResearchUtil.markResearchAsUpdated(p, key);
            }
        });
    }