fbs run result in No module named src

Question

I am trying to build executable file with fbs according this web page (https://build-system.fman.io/manual/). Hierarchy of my structure looks like this hierarchy:

When I try to fbs run command I get error statement

File "D:\Qt\src\main\python\main.py", line 32, in <module>
    from src.main.python.packages import Utilities
ModuleNotFoundError: No module named 'src'

If I try to import library with

from packages import Settings

i.e. it is red underlined but I can build it, although with log file I know code won't go to this module. Do you have any suggestion? I am using Python 3.7