Anyone using printfriendly.com to export to pdf - and it is still operational?

Using https://www.printfriendly.com/button to add a button to my articles to export to pdf.
It's been working great - admittedly in the past - until I wanted to use it today.

It opens the printfriendly page but instead of the articke content, showing 'Security check' and 'Please stand by, while we are checking your browser...'

The browser extension works - the printfriendly page opens, see the content and I can save to pdf, print etc.

If you are using this, is it still working for you?
If so, looks like the issue is from Zendesk side then - what did you have to change in the script or elsewhere?

Thanks