You open your site one morning and, instead of your homepage, there is nothing. Or an unreadable technical message. Or a red error screen. Almost every business owner running a WordPress site has lived through that moment of panic. The good news is that the most common WordPress errors follow a handful of well-known patterns, and learning to recognise them changes everything about how you react.

A WordPress site is an assembly of several parts: the core software, a theme, plugins, a database, hosting. When one of these parts has an issue, it almost always shows up as one of a small set of classic symptoms. Recognising them helps you stay calm and know whether the situation is minor or urgent.

Most WordPress errors come from an incompatibility between a recent update (a plugin, a theme, or core) and the rest of the site, not from some mysterious, unfixable problem. Identifying the right symptom is the first step to acting quickly.

The white screen of death

Probably the most unsettling error: the page is completely blank, with no message at all. It usually comes from a PHP code error in a plugin or theme, often right after an update. The site is not technically crashing, it simply refuses to display anything. This exact symptom is almost always fixed by deactivating the most recently installed plugin, as detailed on our dedicated page /en/relax/ecran-blanc-wordpress/.

The critical error ("There has been a critical error")

A more explicit message than the white screen, but just as blocking. WordPress detected a serious malfunction and chose to stop rendering rather than continue. The causes are close to those of the white screen: a plugin conflict, a code error, or insufficient server memory. See the full walkthrough at /en/relax/erreur-critique-wordpress/.

The 500 error ("Internal Server Error")

This error comes from the server itself, not only from WordPress. It can have many causes: a corrupted .htaccess file, exceeding the PHP memory limit, or a host-side issue. It is one of the broadest errors to diagnose, since it bundles several possible causes behind a single generic message. Our page /en/relax/site-en-panne-erreur-500-wordpress/ explains how to narrow it down step by step.

The database connection error

The message "error establishing a database connection" means WordPress can no longer talk to the database holding all your content (posts, pages, settings). Common causes include a changed database username or password, a corrupted database, or a temporarily unavailable database server. This is an error to take seriously, since it touches the integrity of your data directly. Our dedicated guide is at /en/relax/erreur-connexion-base-de-donnees-wordpress/.

The layout breaking after an update

Less blocking than a white screen, but just as damaging commercially: the site loads, but columns overlap, images spill out, or the design looks "broken." This is almost always a sign of incompatibility between the theme and a recently updated plugin, especially page builder plugins. Our page /en/relax/mise-en-page-cassee-wordpress/ explains how to get back to a normal display.

The site breaking after a general update round

Some errors do not appear in isolation, but right after a batch of updates (WordPress, theme and plugins all at once). The site worked fine the day before, and nothing works the next day. This is a very common case, covered at /en/relax/site-casse-apres-mise-a-jour-wordpress/, which explains why it is better to update items one at a time rather than all together.

How to react in an emergency

Facing any of these errors, a few reflexes keep you from making things worse:

  • Do not touch anything until you have identified the likely cause
  • First check whether an update happened right before the problem appeared
  • Make sure a recent backup exists before making any changes
  • Avoid deleting files or database tables at random "just to see"

These simple reflexes do not always fix the problem, but they often stop a recoverable glitch from turning into a much bigger incident. Taking two minutes to observe before acting often saves hours afterwards.

When to call in a professional

Some errors are solved in a few minutes by deactivating the right plugin. Others, especially those tied to the database or a misconfigured server, need precise technical work to avoid making the problem worse or losing content. If the site is still down after your first checks, or you are not comfortable accessing server files, it is safer to hand it over.

Frequently asked questions

How do I know exactly which error I have? The message shown on screen (or its absence, in the case of the white screen) already gives a strong clue. Check the matching dedicated page above to confirm and act.

Can I lose my content because of one of these errors? Most of these errors relate to the site's display or execution, not to content deletion. The database usually stays intact, except in cases of advanced corruption, which is exactly why a current backup matters.

Can these errors be prevented? Yes, largely. Regular maintenance, updates applied carefully and tested, and keeping only a minimal set of active plugins sharply reduce how often they occur.

Should I panic if I see one of these messages? Not really. None of these errors are unique to your site, and each one has a well-documented cause and fix. Staying calm and working through the checks above is far more effective than trying random changes.

Is your site showing an error right now? Relax by Yumea diagnoses the cause for free and gives you a clear solution, no jargon. Request my free diagnosis at /en/relax/