Version 11.4 of Yoast shut down my entire Avada website until I deleted the plugin. I had to reupload version 11.3 to get it working again. Serious bug. Do no upgrade if you’re using Avada.
We are aware of this issue with Yoast SEO and there is currently an issue report open with our developers here: https://github.com/Yoast/wordpress-seo/issues/13154. Whereas we are unable to provide an ETA as to when this will be resolved, you can comment on the issue report page to receive updates on it’s resolution, or if you would like to contribute any additional information on the issue.