No, you don’t need an account to buy tickets.
However, we recommend creating one on the empik.com website and subscribing to
Various forms of Product delivery are available on the Empik Bilety website, such as merchandise and collectible tickets.
Among the available
Most likely, another user booked them before you finished the purchase. Please choose different seats and try again.
Unfortunately, there is no way to continue the purchase. Please start once again.
This means that either you selected more tickets than there are available in the selected pool or all the tickets
Most likely one of the seats has already been booked, therefore it is unavailable. Try looking in a different part