Error running electron-builder

[hepiyellow]

I am getting this when running npm run compress:electron:

[12:19:46] Starting 'compress:electron'...
[12:19:46] Finished 'compress:electron' after 1.66 μs
paths []
- Running electron-builder 2.11.0
Error: Required option not set
    at Object.Builder.build (/Users/hepi/git/LM2_UI2/node_modules/electron-builder/src/index.ts:49:23)
    at /Users/hepi/git/LM2_UI2/gulp/tasks/compress.js:44:13

The weird thing is that path does not exist:
/Users/hepi/git/LM2_UI2/node_modules/electron-builder/src/index.ts
I mean the src folder does not exist.

So I can't see what kind of Error it is.