Examples link for maturity ratings in New Post UI appears to be broken

Bringing up the hover tip for maturity ratings in the New Post floater and then clicking on the Examples link does no longer open the maturing ratings example page at: https://docs.primfeed.com/help-and-faq/maturity-ratings#breakdown-of-maturity-ratings-differences like it normally should, even though the browser's link preview even displays the target URL.

Instead, the link text merely flashes when clicked.

I'm using the LibreWolf browser, but I have also tested it in a fresh install of vanilla Firefox with the same result.