I also got that first error... i think the nanny (big surprise there) causes it. Do you have dependent sims, like toddlers/babies/pets?
What happened with me is: I booked a trip for a couple, and they've got a kitten at home. So the nanny shows up(a few minutes before the taxi), walks around a little and I get the "there are no children here" dialogue - she leaves. Now the family refuses to leave the kitten on its own and the nanny refuses to look after it, so the vacation is canceled. I hate that f'ing nanny!
Other times (a few...3 or 4) I got that message, the taxi showed up anyway a few hours later. :dontknow: (and I got refunded...which is a bonus!)
My advise would be to have a sim stay home (any sim, grandma, naughty teen etc) and avoid the nanny... (if you have dependant sims)
...and dont go on days when your sim needs to go to work at 10h00. Rather book the trip for a day when everyone is open at that time of day, since thats when the taxi arrives. Have your kids skip school etc.
Hope that helps? Im still getting into it myself...
