Create new custom Beats, generate.py doesn't generate files/dir

Elastic Stack Beats
1

Hi

i'm using this guide:
https://www.elastic.co/guide/en/beats/devguide/current/newbeat-generate.html

after this step
python $GOPATH/src/github.com/elastic/beats/script/generate.py

Beat Name [Examplebeat]: Countbeat
Your Github Name [your-github-name]: {username}
Beat Path [github.com/{github id}/{beat name}]:
Firstname Lastname: {Full Name}

script exited without any indication what happened.

i'm working on Ubuntu 18
python version 2.7.15
Golang 1.12
mod enable.

Also tried this old guide

any suggestion what could get wrong?

Thank.
Barak

2

also with cookiecutter got this issue on brace 7.1 and 7.2