Could not find a part of the path 'C:\Users\user\Documents\OpenRPA\extensions'

[Allan_Zimmermann]

That error is related to nuget, not python.

OpenRPA uses an embedded version of python by default, so packages must be installed using the pip install activity or from inside the local python folder.
See here as well

Using InvokeCode for python code

Hey. OpenRPA uses python embedded, it allows for complete control over the python runtime, that is needed to map variables in/out of python. Therefor it cannot see packages you installed in your “own” python. So you need to use the pip install activity or run pip install from C:\Users\%USERNAME%\AppData\Local\python-3.7.3-embed-amd64 The draw back is, the only python 3.7 is suppurted. If you have a supported version of python 3.7 in your PATH you can go to settings → recorder plugins → Scripti…

Check the logs for any errors if using the activity, or run pip install from command line as explained in the link and see if you get any errors that can help.