Got reply from support and that works for me.
For creating the machine learning environment, kindly uninstall the existing virtual environment and install the machine learning environment using the following line in the anaconda prompt as one line.
conda env create -f https://raw.githubusercontent.com/quantra-go-algo/Quantra_Environment/main/environment_windows_ml.yml
But if you are not working on machine learning algorithms, then the general environment will be fine as well.
For installing the general environment without machine learning:
conda env create -f https://quantra.quantinsti.com/downloads/general/environment.yml