Premier package and pre booking speciality dining

[GE65]

Hi,

Whats the procedure to prebook the 2 ‘free’ speciality restaurants with the premier package?

When I try in the Medallion App, choose a day, time and restaurant, I get payment details appearing, click to ‘buy’ but I get a message that ‘an error occurred’, I have a card registered but I can’t book my ‘free’ offer and can’t pay for it either?

I’m 13 days from sailing if that is relevant.

Is it essential to prebook or will there be plenty of tables available to book either once onboard or on a day by day basis?

 

Thanks