On Thursday, December 13, 2018 there was a new version (5.1) of Contact Form 7, one of the most popular WordPress plugins with over 5 million installations, released. The author/developer, Takayuki Miyoshi, decided to abandon Google ReCaptcha V2 and adopt Google ReCatpcha V3. You can learn about the versions here https://developers.google.com/recaptcha/docs/versions. This implementation forced...