Custom Code Confusion

For context, I am making an ARG horror mod that can open up the camera app. When I tried this, my code seemed fine and I used the custom code snippet feature. However, once I try to export or run the mod in client or server I get this error "error: cannot find symbol". I've been searching all over online to figure out what that means or what I did wrong yet I can't seem to find an answer. (Version 2024.4)

Code block: https://imgur.com/a/hhyI8xF

Error: https://imgur.com/a/sq1nO9a