Coming up short at the till is read as fear of not having enough — time, energy or worth. Tradition ties it to feeling that you cannot meet what is asked of you.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.