You’ve kept your website up to date. The software is current, the theme is current and all the plugins are updated. Then you install one more update and something breaks. A form stops working, a page looks wrong or a feature disappears. It can be confusing when you’ve actually done what you were supposed to do. So why can an update cause problems when nothing was outdated?
An Update Changes More Than the Version Number
An update can change how a plugin or other website component works, even when you don’t notice the change. A developer might alter how a form is generated, how information is processed or how another part of the website accesses it. The new version may still work exactly as intended, but another part of your website may have been built around the way the older version worked.
Your Website Components Have to Work Together
A website can contain a content management system, theme, plugins, forms, payment systems and other services, often developed by different companies. They don’t all get updated together. One developer can release an update that changes something another component relies on, leaving you with a website where everything is current but two parts no longer work properly together.
Your Theme Can Be Part of the Problem
Themes don’t only control how a website looks. They can also affect how certain elements are displayed and loaded. If a plugin changes how it creates a form, button or other element, the theme may not handle the new version correctly. You can therefore update a plugin and suddenly have a display problem without the theme itself having been changed.
The Server Matters Too
Your hosting environment can also affect whether an update works. Website software runs on server software such as PHP, and newer plugin or theme versions may require newer versions of it. If your server is running an older version, updating a plugin can suddenly produce errors even though the plugin itself is completely up to date.
One Plugin Can Depend on Another
Plugins can also rely on functionality provided by other plugins. For example, one plugin might provide information that another plugin uses to display something on your website. If the first plugin changes how that information is provided during an update, the second plugin may no longer be able to use it properly. The second plugin hasn’t suddenly become outdated; something it depends on has changed.
Why It Worked Before the Update
The important difference is that your website was running the old versions together. The update creates a new combination, and something that worked with the previous version may no longer work in exactly the same way. This can happen even when the update is legitimate and the other components haven’t changed at all. A later update from the theme or another plugin may eventually resolve the problem.
The Problem May Not Be What You Updated
This is where things can become particularly confusing. You might update a plugin and then notice that a completely different feature has stopped working. For example, the updated plugin could affect something the theme uses, while the visible error appears on a page controlled by the theme. The component showing the problem isn’t necessarily the component that needs fixing, which is why guessing and changing several things at once can make troubleshooting more difficult.
When an Update Breaks Your Website
If an important part of the website stops working after an update, finding the cause can involve checking the updated component, other plugins, the theme and the hosting environment. A professional can determine whether something needs to be rolled back temporarily, another component needs updating or the problem requires a different fix. This is particularly valuable for business websites where a broken enquiry form, checkout or booking system can go unnoticed until a customer tries to use it.
Keeping a Website Updated Is Only Part of Managing It
For WordPress websites, this is one of the reasons ongoing management can be worthwhile. Plugins, themes and WordPress itself are updated independently, so someone needs to keep an eye on how those changes affect the website as a whole. Keeping software current is important, but so is making sure the website still works properly after the updates have been made.
Up to Date Doesn’t Always Mean Compatible
An up-to-date website can still have problems when one component changes how it works with the others. The fact that an update caused the problem doesn’t necessarily mean the update was bad or that something was neglected. It means the website has changed, and sometimes understanding what changed requires looking beyond the one thing that was updated.
