Sims 3 University Life Issue...(?)

Okay, so the game works fine and everything.

I am now in Uni with three sims and for some reason when I go to check the class schedule it's blank. I looked around online and someone said that you had to remove the kt store fixes and drop out of uni and re-enroll. I did the removing thing while the game was completely closed out, and when I go back in game to drop them out the process goes through but I get something called Error 2. I never heard of this, and the only ones I've heard of was Errors 12, 15, and 16, but not this. What is it and why is it doing this?

BTW, how do you bring roommates with you to come home? I have a sim who is friends with a sim that they seem to want to date, and I want to know how to do this.