Yoast SEO 19.7 Causes Fatal Errors & Crashes Many Websites

Wakas Javed
Yoast fatal error

Yoast SEO released an update to fix a fatal error caused by a conflicting plugin.

It was found that the Yoast SEO WordPress plugin version 19.7 contained conflicts with other plugins, resulting in serious website errors.

This is the third time this year a conflict with another plugin has caused the Yoast update to fail.

Luckily, Yoast saw the report and quickly released a new update that fixed the issue.

WordPress Fatal Error

Several factors may cause the fatal error, but in this case, Yoast SEO update was the culprit where the coding conflicted with another plugin.

This can happen because two plugins are trying to do something, but one is essentially overriding the other or preventing the other from working.

A metaphor for a plugin conflict might be two cars traveling in opposite directions on a one-car road.

Ideally, a plugin considers other plugins in its coding, especially common ones, so that none of them tries to do anything to prevent other plugins from doing their job.

This is what happened with the Yoast 19.7 update.

Yoast 19.7 has a conflict with another plugin (or custom encoding) that changes the admin login URL.

Changing the login URL is a security measure designed to trick hacking software into automatically navigating to the default admin login URL and trying to guess the login password credentials.

Yoast Reports Update Bug

Yoast has been 100% transparent about the error and has posted a tweet explaining to users what happened.

Yoast tweeted:

“After the release of Yoast SEO 19.7, we were informed that this version causes a fatal error when used in combination with plugins or code that alters the default WordPress login URL.
We’ve identified the problem and are working on a solution.”

One of the changes introduced with Yoast 19.7 (according to the Yoast plugin development changelog) is an improvement in the way Yoast handles fatal bugs by not allowing it to work on the login page.

“Improves the handling of fatal errors in the front-end by preventing Yoast SEO to run in the login page, allowing users to access their dashboard.”

Can this be the reason?

Why Do Fatal Plugin Errors Occur?

Plugin conflicts are not exclusive to Yoast. This is only more noticeable when it happens with Yoast as its user base runs into the millions.

However, this is the third time this year that a plugin conflict with a fatal bug has been linked to this year’s Yoast plugin update.

The founder of the Yoast SEO plugin, Joost De Valk, explained in a tweet that it is not always possible to account for the thousands of plugins in the WordPress ecosystem that can lead to coding conflicts.

Joost Tweeted:

“This is the sort of #WordPress plugin conflict situation that I literally don’t know how to prevent from happening. 60,000+ plugins: how do you test your plugin against all of those. If someone has good ideas, I’m all ears”

Joost also tweeted that Yoast always tests its plugin updates with many of the most popular plugins before releasing them.

“We test against the big ones, not worried about those as much, but a couple small ones together still cause enough of a headache.”

He further continued:

“…it’s never fun when you break stuff. We test very rigorously and still stuff goes through. Building plugins for large amounts of users is “just” hard.”

Quick Solution Offered

Yoast released a new update within two hours of announcing that it identified a bug in the update and was working to fix it.

Yoast has released a new update, version 19.7.1. Yoast’s development changelog states:

“Fixes a bug where a fatal error would be thrown in combination with certain plugins that change the standard login page URL.”

Yoast SEO plugin users may consider updating to the latest version of Yoast, version 19.7.1


Featured image: by DcStudio/Freepik

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