When using the Web Management console, a keyring with a name that contains spaces, cannot be selected in the SSL Proxy configuration.
In this article, the keyring is named "my favorite keyring".
In the Web Management console, under Configuration > Proxy Settings > SSL Proxy > Issuer Keyring,
selecting a keyring with spaces will result with the following error
Connect to the SSH console of the ProxySG.
Run the following command and specify your keyring name under double quotes " ":
(config ssl)proxy issuer-keyring "my favorite keyring"
Then you can reload the Web Console to see the change