You have a meeting with a big client and you find out a half hour before the meeting that you messed up the most important page in the packet that you are giving your client. What do you do in this situation?
The first thing I would do is notify the team that you are working with. It is important to tell people who are more senior to you who may know more about what to do in the situation. They could also help you organize a way to fix the situation. Once in the meeting, if the problem can't be fixed, you must make sure to point the client to the issue and how it should be corrected. Full disclosure to both your team and the client, as well, as honesty is what they are looking for here.