Hi,
Since you’ve confirmed that your website is already on the latest version of Yoast SEO for WordPress v16.6.1, we would recommend that you try and reset the indexables and see if this resolves the issue:
1. Install & activate the?Yoast Test Helper plugin
2. Go to Tools > Yoast Test
3. Locate the Yoast SEO section and click on the ‘Reset indexables tables & migrations’ button. The page will reload to confirm that each reset was successful. Note: this won’t actually erase your SEO data, which is also stored in WordPress’ default tables. It’ll just reset our index (custom tables) for that data.
4. Go to SEO > Tools, and under SEO data, click the “Start SEO data optimization” button to allow Yoast to rescan your?content.
For your site’s health and safety, we recommend creating regular backups of your site and database. This is especially important before installing, updating or removing plugins. Learn more about the benefits of regular backups.
If that doesn’t resolve the issue, then we’d recommend performing a conflict check to see if there isn’t a plugin or theme on your setup that is causing this.
The fastest way to rule out any conflict, is to deactivate all non-Yoast plugins and switch to a standard theme like Twenty Twenty.
Please test this on your development or staging site, if you have one. If not, we recommend using the Health Check & Troubleshooting plugin. This plugin has a troubleshooting mode, which does not affect normal visitors to your site.
If you’re unfamiliar with checking for conflicts, we’d like to point you to a step-by-step guide that will walk you through the process: How to check for plugin conflicts
If you do not feel comfortable to do this yourself or if this does not solve your issue, our Yoast SEO Premium plugin comes with one year of (technical) support.