Yes -It is missing information. Return to the 1099-R and go through all of the questions. It is a very complicated section. If you have both 401k and IRA distributions, the program must verify that you took all of the RMD across all accounts that you are required to take. It must check IRA or not, codes, etc. Please review your answers.
If you still have trouble, reply with the exact message and worksheet section- as much as you can for us to help you. The review screen should be showing you part of a form and have specific questions.