Fix for error: ‘Namespace’ object has no attribute ‘standalone_supported_challenges’. ERPNext

If you have a self-hosted ERPNext installed using frappe and if you faced the error
Renewal configuration file /etc/letsencrypt/renewal/foobar.spritle.com.conf (cert: foobar.spritle.com) produced an unexpected error: 'Namespace' object has no attribute 'standalone_supported_challenges'. Skipping, then here is the fix for it.

All you got to try is, go to the domain-specific config file
/etc/letsencrypt/renewal/foobar.spritle.com.conf and

then remove or comment the line
standalone_supported_challenges = tls-sni-01, and save the file, then run the command
sudo bench renew-lets-encrypt, you will see the success message
Congratulations, all renewals succeeded

Thanks to kmwenga for the tip.