PyCharm with Docker image returns “Process finished with exit code 128” on RUN command

I'm trying to complete this very basic tutorial. It's a short explenation of how to run Docker image as remote interpreter in PyCharm.
I'm using Win7 and latest PyCharm version.
First I had problems with the paths but after playing with them for a bit now they looks like this:

 - Environment variables: DJANGO_SETTINGS_MODULE(djangotestone.settings)
   & PYTHONUNBUFFERED(1)
 - Working Directory:
   \C\Users\Passanova\PycharmProjects\djangotestone\djangotestone
 - Path Mappings:
   /C/Users/Passanova/PycharmProjects/djangotestone=/opt/project
 - Docker container settings: -v
   /C/Users/Passanova/PycharmProjects/djangotestone:/opt/project

So now when I atempt RUN comannd I get the following return:

    1f52b930ec0f:python -u C:/Users/Passanova/PycharmProjects/djangotestone/manage.py runserver 8000
    
    Process finished with exit code 128
The server does not start and I'm not able to verify the container by `docker ps -l`. Every time I press RUN button new container is created as expected but it never do the job and I'm never able to verify it.
In return I can `docker run -it <img> /bin/bash` and `$python --help` is OK.
In the terminal `docker run minimum/docker-django-mysite python --help` is good as well.

This is my debug result:

    ad0418d30d5a:python -u /opt/.pycharm_helpers/pydev/pydevd.py --multiproc --qt-support --save-threading --save-asyncio --client 10.0.2.2 --port 19383 --file C:/Users/Passanova/PycharmProjects/djangotestone/manage.py runserver 8000
    
    Process finished with exit code 128

I even try to change the image whit Django:latest - no effect.

I'm not sure what the `-u` option means but I noticed it is not presented when RUNing with local interpreter.
There is one more thing. It looks like after modifying the pats I escaped most of the path errors. However under Python Console I still have:

    Error:{"message":"The working directory 'C:/Users/Passanova/PycharmProjects/djangotestone' is invalid. It needs to be an absolute path"}

Any help appriciated