Speech Recognition stops listening to a person, how to fix it?

Question

Python

I make a voice assistant, after the first command it stops working and gives 2 errors:
1 .line 34, in
query2 = r.recognize_google(audio, language='ru-RU')
2. File "C:\Python\Lib\jarwisNew\venv \lib\site-packages\speech_recognition\__init__.py", line 858, in recognize_google
if not isinstance(actual_result, dict) or len(actual_result.get("alternative", [])) == 0: raise UnknownValueError()
speech_recognition.UnknownValueError

is more interested in the 2nd error. Here is the whole code:

import speech_recognition as sr
import pyttsx3
import pyaudio
import webbrowser

engine=pyttsx3.init()
def record_volume():
r = sr.Recognizer()

with sr.Microphone(device_index = 1) as source:
audio = r.listen(source)

query1 = r.recognize_google(audio, language = 'ru-RU')
(f'{query1.lower()}')

if query1 .lower() == "start" or "download":
engine.say("Hi!")
engine.runAndWait()

if query1.lower() == "how are you":
engine.say('Great!')
engine.runAndWait()

record_volume()

while True:

r = sr.Recognizer()

with sr.Microphone(device_index=1) as source:
audio = r.listen(source)

query2 = r.recognize_google(audio, language='ru -RU')
(f'{query2.lower()}')

if query2.lower() == "start" or "download":
engine.say("Hi!")
engine.runAndWait()

if query2.lower() == "how are you":
engine.say('Great! ')
engine.runAndWait()

PS through while true I wanted to make the program not stop working