We've been using the Python google-ads library for a while now from behind 
our corporate firewall and it was working fine until yesterday.  

Last time it worked was yesterday 7/25/22 at 12:30pm EDT then at 1:30pm we 
started getting the following error:

Exception: HTTPSConnectionPool(host='accounts.google.com', port=443): Max 
retries exceeded with url: /o/oauth2/token (Caused by 
SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] 
certificate verify failed: self signed certificate in certificate chain 
(_ssl.c:1131)'))) at 2022-07-26 17:43:49 HTTPSConnectionPool(host='
accounts.google.com', port=443): Max retries exceeded with url: 
/o/oauth2/token (Caused by SSLError(SSLCertVerificationError(1, '[SSL: 
CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed 
certificate in certificate chain (_ssl.c:1131)')))
Traceback (most recent call last):
  File 
"/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/urllib3/connectionpool.py",
 
line 703, in urlopen
    httplib_response = self._make_request(
  File 
"/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/urllib3/connectionpool.py",
 
line 386, in _make_request
    self._validate_conn(conn)
  File 
"/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/urllib3/connectionpool.py",
 
line 1040, in _validate_conn
    conn.connect()
  File 
"/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/urllib3/connection.py",
 
line 414, in connect
    self.sock = ssl_wrap_socket(
  File 
"/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/urllib3/util/ssl_.py",
 
line 449, in ssl_wrap_socket
    ssl_sock = _ssl_wrap_socket_impl(
  File 
"/opt/rh/rh-python38/root/usr/local/lib/python3.8/site-packages/urllib3/util/ssl_.py",
 
line 493, in _ssl_wrap_socket_impl
    return ssl_context.wrap_socket(sock, server_hostname=server_hostname)
  File "/opt/rh/rh-python38/root/usr/lib64/python3.8/ssl.py", line 500, in 
wrap_socket
    return self.sslsocket_class._create(
  File "/opt/rh/rh-python38/root/usr/lib64/python3.8/ssl.py", line 1040, in 
_create
    self.do_handshake()
  File "/opt/rh/rh-python38/root/usr/lib64/python3.8/ssl.py", line 1309, in 
do_handshake
    self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate 
verify failed: self signed certificate in certificate chain (_ssl.c:1131)

Our security people are saying that nothing changed on our end. Was there 
any change in that time period on Google's end?

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