Last update crashed part of my site

same here too. 4 sites crashed. Had to go back to an older version

Mine, too. It was possibly a conflict with the PHP everywhere plugin or more likely how I use it. I use the following code to display Yoast content on the front end.

<?php $object = WPSEO_Frontend::get_instance(); echo $object->metadesc( false ); ?>

Its messed up Buddy press here too. Took down 4 of my sites. Had to turn Yoast off till you guys can fix it

Messed up the Buddy press PHP in my Aardvaak theme crashing the sites but luckily only the Buddypress pages were effected so I was to get into the site through my backdoor safety page.

Hello All,

We are sorry that the latest version of the plugin caused issues on your sites.

Often, we see problems occur in combination with another plugin or theme. 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.

I can confirm that there is a conflict with the PHP Everywhere plugin.

Kindly exercise some patience…there does seem to be an error with this update for some. it seems to be breaking up some sites. Kindly install the previous version back on your site if you are experiencing any problems.
1. Go to the downloads section at www.ads-software.com
2. Go to the Yoast download page ( where the plugin is located) at the right-hand section of the page click ADVANCED VIEW.
3. Scroll down the page which opens, you will see an option to download previous Yoast plugin versions including 17.7…

Already done. 17.7.1 doesn’t cause the issue.

Same problem after upgraded to 17.8. It conflicts with WP AMP plugin with critical error. Previous version 17.7.1 is fine.

Hi all,

While there is no single specific error log in this thread, the plugin names mentioned here match the plugins that are known to be causing a particular issue when Yoast 17.8 is installed. Therefore, the following message may apply to most, if not all, participants of this thread.

The WPSEO_Frontend class has been deprecated since version 14.0 of our plugin. In version 17.8, we completely removed it. If any code tries to access that class, it will throw a fatal error.

This most likely means that there is code in your website that is trying to do this. To fix the problem, you will have to find the plugin or custom code responsible and disable / change it. Most of the time, the fatal error will be accompanied by a message showing which files were trying to execute the failing code, and a plugin name may be found in there.

If you have written this code yourself, please see https://developer.yoast.com/blog/yoast-seo-14-0-using-yoast-seo-surfaces/ for alternatives. If you find that it is a plugin or theme that is calling this code, please contact the maintainer of that add-on (and feel free to share the previous link with them).

Some of the plugins that we know of that had this code have since updated their plugins to mitigate this. Please make sure you are running the latest versions of all your plugins and themes.

@djennez Thanks. That solved the problem for me.