<urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1129)>

This error occurs when the SSL certificate presented by the server cannot be verified by the client. This can happen for a number of reasons, including an expired or invalid certificate, a misconfigured server, or an issue with the client's certificate store.

To fix this error, you can try the following:

1. Check the validity of the SSL certificate presented by the server. You can do this by visiting the website in a browser and checking the SSL certificate details. If the certificate is expired or invalid, you will need to contact the website owner to resolve the issue.

2. Check your system's certificate store to ensure that it is up to date and contains the necessary root certificates. You can do this by following the instructions for your operating system.

3. If you are using a custom SSL certificate, make sure that it is installed correctly on the server and that the client is configured to trust it.

4. If the issue persists, you may need to contact your network administrator or IT support for further assistance.