We completed Friday's guild quest in the early hours of Saturday morning, we didn't get one when the new dailies rolled in on Saturday (at 2am GMT, work evenings/nights so i'm usually on at that time) so thought we were to late completing it but it would show at some point on Saturday which is what usually happens.
Its now Sunday and we've still not recieved a new guild quest, I've sent a ticket to support but from talking to other guilds we are not the only one with this issue.