Princess Eugenie was praised for “respecting Saudi Arabian culture” as she flew to the country to support Princess Beatrice. Princess Beatrice, 35, spoke at the Open Forum: Meet the 21st Century Entrepreneurs event in Riyadh over the weekend. The event, part of the World Economic Forum, hosted several speakers including the Princess of York. Princess Eugenie, 34, attended the event to hear her older sister speak in the discussion panel. Eugenie earned praise for wearing a long-sleeved black top underneath a sleeveless dress, in line with Saudi Arabia’s modesty laws. The princess wore her Erdem…