"Try it now" error generating oauth

[curl] 60: Peer's certificate issuer has been marked as not trusted by the user. [url] https://tapi.telstra.com/v2/oauth/token

The above error occurs on the dev web site itself when using the "try it now" area to generate a token. I assume it works fine outside this site, but haven't actually tried yet.... Just thought someone at Telstra might like to check it out since it's not a great look when new customers come along and press buttons on the site. Edit: Tried it from my PC - works fine. So it looks like just the website itself doesn't like the certificates. But while I'm adding info - the page "https://dev.telstra.com/content/messaging-api-getting-started" has a quote mark missing from the send message example code at the start of the scheduledDelivery line. Not the most encouraging documentation so far :S