Unless you were there for the described events, I would be very careful taking anyone's word for why they didn't complete nursing school. I've personally heard numerous stories about the one trivial thing that got in the way of graduating and becoming a nurse.
It's understandable that you want to help your friend. Her best bet now is to speak to someone in her school who can clarify for her exactly where she failed to meet requirements, and what, if any, remediation would get her reinstated.
Otherwise, just keep on being a supportive friend. If she is to become a nurse, she's going to have to be a big girl and forge ahead.