Just run the following commands before trying to reproduce the issue:
git submodule init
git submodule update --recursive
Then, one of the following depending on your terminal interpreter:
Bash
python3 -m venv .venv
source .venv/Scripts/activate
python -m pip install -r requirements.txt
CMD
python3 -m venv .venv
.venv\Scripts\activate.bat
python -m pip install -r requirements.txt
Power Shell
python3 -m venv .venv
.venv\Scripts\Activate.ps1
python -m pip install -r requirements.txt