Tensorflow issue

Hi, I am trying to install RASA via “pip install rasa” in my venv in Win10, and I get the below error: ERROR: Could not find a version that satisfies the requirement tensorflow-cpu~=1.15.0 (from rasa) (from versions: none) ERROR: No matching distribution found for tensorflow-cpu~=1.15.0 (from rasa)

Any idea how to overcome this?