If you use Woocommerce on your WordPress website, there’s a chance you’re also using the (very good) Woothemes Xero Plugin.

Unfortunately, if you’ve already upgraded to WordPress 4.4 you will be receiving a new error message when you try to generate invoices.

“Fatal error: Uncaught exception ‘Exception’ with message ‘There was a problem connecting to the API.’ ” – followed by some extra info describing the error in more detail.

Our investigations found that it is due to WordPress 4.4 having removed a number of SSL certificates from the bundled root certificate file. (more info here)

We raised a ticket with Woothemes, who gave us this response:

This issue is due to a recent bug with WordPress 4.4 which I believe would be resolved with the 4.4.1 update, you can however resolve it by installing and activating the attached plugin which serves as a fix.

It’s a few simple lines of code instructing WordPress 4.4 to go ahead and use SSL anyway, and you can download it here: WordPress 4.4 and Xero Plugin Fix