Get Python Object: Error converting Python object With String

Hi colleagues, I have a little problem when executing my python script in a uipath sequence, exactly in the Get Python Object activity, I get the error Get Python Object: Error converting Python object.

I don’t understand why this can happen, taking into account that the return variable in my script is String type, and also the typeArgument is string
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import speech_recognition as sr
import time
from pydub import AudioSegment

def convert_audio_to_text():

src = 'C:\\Users\\TTssRpaConba\\Desktop\\audio.mp3'
dst = 'C:\\Users\\TTssRpaConba\\Desktop\\audio.wav'

# convert wav to mp3                                                            
audSeg = AudioSegment.from_mp3(src)
audSeg.export(dst, format="wav")

r = sr.Recognizer()
with sr.AudioFile(dst) as source:
    # print("Say Something...")
    audio = r.listen(source)

    try:
        text = r.recognize_google(audio, language='en-US')
        time.sleep(1.5)
        return text
    except:
        return "I am sorry I can not understand"