The expert, former royal butler Grant Harrold, stated that the couple will need to shift their focus from their current PR strategy towards "trying to heal" their relationship with the royals after the coronation of King Charles.
Harrold cautioned that failure to do so could lead to long-term conflict with the institution, as the family has demonstrated they will not back down.
Harrold's warning comes in response to the couple's recent public criticisms of the royal family. In a Netflix series and memoir released after the death of Queen Elizabeth, the Duke and Duchess of Sussex appeared to blame Prince William and Kate Middleton for their decision to step down as working royals.
Prince Harry's memoir "Spare," released in January, contained explosive allegations against his brother and other members of the British royal family.
After the publication of the book, there was speculation that King Charles would not invite Harry and Meghan to his coronation. However, the king ultimately decided to invite them because he believed Harry's absence would create more issues than his presence.
Overall, the warning from Harrold emphasizes the need for the couple to rethink their approach towards the royal family and seek to repair relationships if they hope to avoid further conflict.