Error code

macOS -120

MACOS-120
System Error Code· A POSIX/system errno returned when a system call fails.

What it means

Directory not found (dirNFErr) — the specified directory path does not exist..

How to fix it

  1. Verify the folder exists in Finder.
  2. recreate the missing directory.
  3. update the app's stored path preference.
  4. restart the app so it re-resolves its working directory.

Not affiliated with macOS. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.