I also faced the same issue in windows 10 and after research, i found its a python installation issue in windows 10.
steps to resolve the issue:
- Please uninstall non-relavent python from windows 10.(else create python virtual environment).
- Please install chocolatey in windows 10 using - Installation link.
- Open cmd as admin and run below with specific python version choco install python3 --version 3.6.5 ref - Chocolatey Gallery | Python 3.x 3.6.5
- Verify your environment variable have a new Python installation path.
- open new cmd and type python and verify the version.
- on cmd run - pip install rasa.
it’s better to create a virtual environment and do development there and follow above steps. Go to new folder and open cmd . 7. pip3 install -U pip virtualenv (folder name). 8. type - .\venv\Scripts\activate. 9. pip install --upgrade pip.