Class extends value [object Module] is not a constructor or null

[anandmuthu1978]

Hello,

I tried the example of creating my own custom generator.

https://yeoman.io/authoring/

I copied 100% the code from package.json and index.js. Ran npm link too without any errors. When executing yo the following error occurs
Class extends value [object Module] is not a constructor or null

I tried this in two different environments, local PC and online IDE. Both have the latest nodejs installed.

What am I doing wrong ?

[anandmuthu1978]

Downgraded "yeoman-generator" from 7.5.1 to 4.13.0 and its seems to working.