Installation goes fine until "npm run electron" produces "Unable to find electron app.."

[mmmikko]

Describe the bug

Not probably a bug, but installation instructions could take into account newbie like me.

To Reproduce

According to instructions:
In separate terminal:
npm run electron

This produces the error.

Expected behavior

Electron and the app starts to run.

Screenshots
If applicable, add screenshots to help explain your problem.

Software info:

• OS: Windows 10
• Gingko Version 2.4.15

Additional context
I tried to install electron the first time the error occurred but haven't yet found a way that would eliminate the error.
(sorry for multiple edits, accidentally pressed enter the first time in the middle of writing this issue..)