He's a seeded player who will replace him?
According to the "as it happens" part of the tournament site, he'll be replaced by a LL.
1.05 pm: Gasquet will be replaced by a lucky loser – picked at random from the four best-ranked losers in the final round of qualifying. And yes, to reply to Aniek’s incredibly astute question down below, the lucky loser will inherit Ritchie’s bye into the second round. If the lucky loser loses in the second round, he gets no ranking points, but if he wins, he gets the second round points. Someone is going to be veeeeery lucky today.