no pyvenv.cfg file or, Python Interpreter error

[Solved this two Stack Over Flow issue:
1)
https://stackoverflow.com/questions/52404529/cannot-setup-a-python-sdk-in-pycharm-project-using-virtualenv-after-os-reinsta/70457029#70457029

2) https://stackoverflow.com/questions/61026458/no-pyvenv-cfg-file]

Delete venv (Virtual Environment) folder if it exists in the project
then go to File>Settings>Project>Python Interpreter . Click the Python Interpreter box and select Show all . Delete Invalid Interpreter by clicking (-)

Click + to create a new venv

You may see this then:

Now run a code and it will be solved