High school years bug: teacher wont teach my sim

I made a family where I have 3 teenager sims. Their first school day there wasnt a question if i want to go school with them, and they just went to school normal way.

Their second school day I put on only one teen that game asks if they go to school and on other teens i didnt put that. Then i was able to go to school with that one teen. I assume I wasnt able to go to school with 3 teen but with only 1. 

Then when my sim went to school on second day she wasnt able to join high school from principal. (I played high school with another sim before and i remeber on first day she joined school from principal)

Then I assume this maybe causen a bug, that my sim`s teacher wont teach my sims`s class. The teacher is just standing at cafeteria and wont do anything. And my sim isnt able to go to her classes because teahcer wont teach.

Does anyone know how to fix this? This is very annoying