Poor handling of parking conditions. If you do not...

Poor handling of parking conditions. If you do not discover that you have to buy a parking ticket on the website, you will receive a control fee. The day we were visiting, the vending machine did not work and we could not spot a sign with information about buying parking tickets on their website. Why is it not possible to purchase parking as an additional service in connection with the purchase of the entrance ticket? It seems like peasant hunting.