Apologies, I run the Bypass Paywalls Clean extension for Firefox so I don't even notice when sites have paywalls (and I recommend everyone else do the same). It's right up there with adblockers as being almost an essential component of browsing the web these days.
https://github.com/bpc-clone/bypass-paywalls-firefox-clean
Here are a few more options for viewing the article without a paywall if you don't want to install an extension.
Sorry about that! See this comment for a few ways around the paywall.