Yes, I'm having this issue as well. Sent children in my main family to camp, came home children and adults won't go to work or school. Says 2 days for the children and one adult, and 4 days for the other adult. After a day had passed the second adult changed from 4 to 7 days. I tried repairing the game. I have no mods installed. I don't think I have any earlier saves for my main family and won't want to keep playing until this is fixed. I don't want to lose my main family either. I will see what happens if I quit jobs.
Update - Was able to quit a job and start again with one adult. They were then able to go to work, but there's no way to reset the kids. At some point the length of time until school increased from 2 days to 4 days.
