json.decoder.JSONDecodeError - Google Mobile Friendly Tool API

Question

I'm using Google Mobile Friendly Tool API. It used to work properly but now I'm getting next error:

I don't know what it could be. Any help? Thank you.

This is my code:

s = """URL1
URL2"""

urls = s.split("\n")

# Requests & API
import requests
api_key = '*****'
service_url = f'https://searchconsole.googleapis.com/v1/urlTestingTools/mobileFriendlyTest:run?key={api_key}'

for url in urls:
    print(url)
    params = { 'url': url }
    response = requests.post(service_url, json=params).json()
    print(response['testStatus']['status'], url)

Error:

Traceback (most recent call last):
  File "/Users/****/Google Drive/2022/Py/Library/mobile_friendly_tool.py", line 26, in <module>
    response = requests.post(service_url, json=params).json()
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/requests/models.py", line 898, in json
    return complexjson.loads(self.text, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/json/__init__.py", line 357, in loads
    return _default_decoder.decode(s)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)