Queen Elizabeth breaks royal protocol for her granddaughter Princess Beatrice

Queen Elizabeth breaks royal protocol for her granddaughter Princess Beatrice 

Since the announcement of the engagement of Princess Beatrice, the granddaughter of Queen Elizabeth, to businessman Eduardo Mobili Mozzi, the scandal of her father, Prince Andrew, and then he stepped down from his royal duties, the date of her engagement ceremony was postponed, and then changed several times the place where she will hold her wedding.

For this reason and in order to support her, Queen Elizabeth decided to break royal protocol

She invited Princess Beatrice's fiancée to celebrate Christmas, which is limited to married couples only, so the royal guests arrived at the palace. Princess Beatrice, her fiancé, her sister Princess Eugenie, and her husband Jack Brooksbank were the first to arrive at the palace in reverse order.

Why did Princess Beatrice cancel her engagement party?