[NEEDS SAVES] Can't travel with more than 2 Sims

For some reason I can't travel with more than one sim. I've tried restarting but it doesn't work. It allows me to select one sim only. When I try take vacation option it selects three sims for me but if I deselect one I can't reselect them nor can I select more sims. It also doesn't work with other households in the same save file nor does it work with new save files.