i usually find an out of balance error is caused by a missing account on the GL controls. You can use the PE log viewer to see what the posting Engine is doing.
i dont have time for explaing how to use the PE log viewer right now but be warned it is a little technical look for a missing account in all the entries…
note: you can also edit some details in the review journal and post it from there…not sure if you can add lines or not. Use the “Journal Entry confirmation” action to try posting from the review journal.