you have attached an Administrator log, so the Administrator actually does start, but it stops while scanning your AI airplanes. I am not sure if that is feasible for you, but you could add all AI airplane folders to "ignored_aircraft_folders.txt" in FSCaptain's Config directory. Also, there is usually no need to start the Administrator during a flight. It is used to configure airplanes and to generate a proper dispatch document, but during flight, only the FCDU matters.
For more analysis, we would need more information. Doe the Administrator work when the FCDU is not running? Can you send us FCDU logs as well?