Background.js not being compiled to app.asar

[IH-Priyam]

I have an application that runs well on "serve', but on building the application, I was getting Error: Application entry file "background.js" in the "....../app.asar" does not exist. Seems like a wrong configuration. Which is similar to issue #1637. But when i followed the thread and removed main: "background.js" from package.json, i get this similar errror now:
Error: Application entry file "index.js" in the "/application-improvment-UserMode/dist_electron/linux-unpacked/resources/app.asar" does not exist. Seems like a wrong configuration.
Also I am using "vue-cli-plugin-electron-builder": "~2.1.1", but the issue only offers solutions for version 3 Alpha.
Why are the files not being properly compiled to app.asar? How do I debug this issue?
Attached are the package.json and vue.config files
package.json