On Ubuntu, This worked for me.
(venv) root@om:/workspace/nnn(master)# export PYTHONIOENCODING=‘utf8’ (venv) root@om:/workspace/nnn(master)# rasa init --no-prompt
Welcome to Rasa! 
To get started quickly, an initial project will be created. If you need some help, check out the documentation at Introduction to Rasa Open Source.
Created project directory at ‘/workspace/’. Finished creating project structure. Training an initial model…