Salt was once precious enough to pay wages, and bread and salt still greet guests. It is read as worth, hospitality and protection; spilled salt as a small rift.
Does the traditional reading fit your dream, or did it mean something else to you?
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.