Speech_to_text not working on Test mode

Hi everyone,

I'm fresher in FlutterFlow and trying to follow this video to create an AI Voice Assistant using Speech_to_text library.
https://www.youtube.com/watch?v=1GmgjkZiDsk
However, I noticed that Speech_to_text doesn't work on Test Mode, throwing error like this

Error!: SpeechRecognitionError msg: not-allowed, permanent: false

But it works perfectly on Run Mode, I'm very curious and wants to know the reason.

Thank you,