@simonm3 Finally!!! 
For Installation please follow these steps:
Please follow these steps for the installation of ROS and Rasa X
Please install Anaconda from Anaconda | Individual Edition , then create the conda environment using the following command
- conda create -n rasa3 python=3.8
- conda activate rasa 3
PS: If you using Linux, check the environment for the same.
Note: I’d recommend to create a fresh environment if not you can proceed with next steps:
For Rasa Open Source:
`pip install rasa==2.8.1`
`pip install rasa-sdk==2.8.1'
check version rasa --version its install or not
For Installing basic project:
rasa init
then if you need
For Rasa-X Installation
pip install rasa-x==0.39.3 --extra-index-url https://pypi.rasa.com/simple
check rasa version rasa --version its install or not
You will see some error : ImportError: cannot import name ‘RowProxy’ from ‘sqlalchemy.engine’ Install
pip install SQLAlchemy==1.3.22 should fix it
If sanic related error:
pip install sanic-jwt==1.6.0
delete .db (events and rasa ) if is showing alembic issue.
Note: If you not able to install and taking a lot of time you can downgrade the pip version to 20.2
pip install pip==20.2
If you have any error in-between please share with me.
Note: You will see the Event Loop Close error in the terminal, you can ignore that, its an persistent issue with Rasa X and team is working on it.
I hope this will solve your issue. Good Luck!
PS: First try install basic mood bot of rasa, talk and then go to other project.