Error-Message when py-File in different folder?

Hello,

i am working on a small webscraping project using selenium -

When i start the program "test2.py" which is in the folder "Python-Diverses" everything works fine:

But when i start - the absolute same program with the name "test2.py" from the sub-folder "WebScraping with Selenium" i get the following error
(trired it also from other folders - same error - it only works directly in the folder "Python-Diverses" from the above example)

How is this possible that the selenium package is only working in this very one folder?
I also tried to deinstall / install the package with pip uninstall selenium / pip install selenium in cmd again - but the same situation.

How could this be...?