WordPress sites break. It happens. One day everything is fine, the next day something stops working. A page does not load, login fails, or you see some error that was not there before.
In most cases, it is not something big. Usually, it is one small thing somewhere causing all of it, even though it does not look that way at first.
This post is just about those common WordPress errors and what you can try when you run into them. Nothing fancy, just the usual stuff that tends to work.
- WordPress errors happen, even if everything was working before
- Most issues come from plugins, themes, or small changes
- It helps to check one thing at a time instead of changing everything
- Taking a backup before fixing anything is always safer
- Many problems look big, but are usually small once you find the cause
Before You Start Fixing Anything
When something breaks, most people start clicking around and changing things straight away. That is where things usually get messy.
Try one thing at a time. That way, you will know what worked and what didn’t. If you can, take a backup first. Even a quick one is fine.
Also, think back. Did you update something? Add a plugin? Change a setting? Sometimes that is where it started.
That is usually enough before you start digging deeper.
Common Reasons WordPress Errors Happen
Most errors in WordPress do not come out of nowhere. There is usually something behind them, even if it is not obvious at first.
- Plugins are a common one. Sometimes they do not work well together, or an update breaks something.
- Themes can also cause issues. Especially if they are outdated or heavily customized.
- Then there is hosting. If the server has problems, the site can start acting strangely even if nothing has changed on your side.
- Updates can also lead to problems. A plugin update, WordPress update, or even PHP changes can trigger errors.
And sometimes it is just a small setting somewhere. Something that looks harmless but ends up affecting the entire site.
Most of the time, it is one of these.
Let cmsMinds take a look and fix the problem without making things more complicated.
Most Common WordPress Errors and How to Fix Them
There are multiple ways to fix WordPress errors. Here’s how you can fix them by checking things one by one.
Error #1: Error Establishing a Database Connection
What you usually see
You try to open the site, and it just shows that one message. Nothing else after that. Pages do not load. Admin also does not open. It just stays there like that.
Why it happens
It usually comes down to the database not connecting, but that still does not tell you much. Sometimes it is just the details being off. The rest of the time, everything looks completely fine, and it still doesn’t work. It mostly means something is wrong on the server side.
Sometimes, even if nothing was changed in the settings, the error still shows up. That is when it gets a bit confusing. So there is no single reason you can point to straight away.
What to check
The first thing people usually look at is the wp-config file. That is where the database details sit. Name, username, password, host. It looks simple, but even one small mismatch there can cause this.
If that part looks fine, then it might not be in the file. It could be the database server itself. This happens sometimes, especially on shared hosting.
There are also cases where the database itself has issues. It is not very common, but it still happens sometimes.
Quick ways to fix
The first thing most people try is checking the wp-config file again, properly this time. It is easy to miss something the first time.
If nothing stands out there, then it is worth checking if the database server is actually running. Sometimes it is just that.
If you can access the database tools, you can try a repair and see if anything changes. It does not always do much, but it is still worth trying.
After that, it is mostly checking things one by one. You try something, refresh, and see if anything is different. Some things work, some do not. It takes a bit of back and forth.
Error #2: White Screen of Death
What you usually see
You open the site and… nothing.
Just a blank page. No errors, no message, nothing to read. It feels like the site is there, but not really loading anything.
Sometimes, instead of a blank screen, you might see a “critical error” message. But that also does not say much.
Why it happens
This kind of WordPress white screen usually shows up when something breaks badly enough that WordPress cannot load the page. Plugins can cause this. Themes too. Sometimes it happens after an update, sometimes even without any obvious change. It is not always clear what caused it right away. You just know something stopped working.
What to check
Most people start with plugins. If you can access the files, you can rename the plugins folder and see if the site comes back. If it does, then one of the plugins is the issue.
Themes are another thing to check. Switching to a default theme can help you figure out if the problem is coming from there. Memory can also play a role. If the site does not have enough memory, it can fail like this.
Quick ways to fix
Plugins are usually the first thing people look at. Try turning them off and then check the site again. If nothing changes, then it is probably not that. Then you can try the theme. Just switch it for a moment and see if the site behaves any differently.
Memory can also cause issues sometimes. If you have seen that before, you can increase it and check again. After that, it is more of trying things one by one. Check, refresh, try again. That is usually how you narrow it down.
Error #3: 500 Internal Server Error
What you usually see
A 500 error shows up instead of the page loading. That is usually all you see on the screen.
On some setups, the message looks slightly different, but nothing really loads after that. It just stays there with that error and no clear hint of what caused it.
Why it happens
This error is not very specific, so it can be a bit confusing.
Sometimes it comes from a plugin or the theme. Other times, it is something on the server side. There is no single place to look first.
It can show up after an update or after adding something new, but not always. There are also times when nothing obvious was changed, and it still appears.
So you end up checking things one by one until something starts to make sense.
What to check
A common place to look is the .htaccess file. If that file is not right, it can cause this error. People usually try resetting it and then check again. Plugins are another thing. Disabling them and checking the site often helps narrow it down. Themes too. Not as common, but still possible.
Quick ways to fix
Try resetting the .htaccess file first and see if that changes anything.
If not, move to plugins. Disable them and check the site again. Then the theme. Switch to a default one and see if it loads.
After that, it is mostly checking step by step. Something usually stands out once you go through it.
Error #4: 404 Errors on Pages or Posts
What you usually see
A page that was opening fine before suddenly shows a 404. The page is still there in WordPress. You can see it in the list; nothing looks deleted, but from the front, it just does not open.
In some cases, it is only one page doing this. Other times, a few more pages start showing the same thing, even though nothing obvious was changed.
Why it happens
This usually ends up being something around permalinks, but it is not very clear when it happens.
Something in the URL setup changes, or WordPress just does not read it the same way anymore. It can happen after moving the site or after an update, but not always.
There are also times when nothing noticeable was changed, and the issue still shows up, which makes it harder to pinpoint one reason. You mostly notice it after pages stop opening, not when it actually starts.
What to check
Check permalink settings. You do not always have to change anything. Just opening the settings and saving again can sometimes fix it.
If that does not help, then it might be the .htaccess file. That file controls how URLs are handled, and if something is off there, pages can stop working like this. Also, worth checking if the page actually exists and was not moved or deleted by mistake.
Quick ways to fix
Go to permalink settings and save them again. Even without changes, this can reset things.
If the issue is still there, check the .htaccess file and see if it needs to be reset.
If you recently moved the site or changed URLs, it is worth checking those changes again. After that, it is mostly about checking what changed recently and going from there.
Error #5: Locked Out of WordPress Admin
What you usually see
The login page shows up, but access just does not go through. The password looks right, still no entry. Sometimes it refreshes and brings you back to the same screen again. Other times it throws an error, or just loops without really saying what is wrong.
Why it happens
There are a few different things that can lead to this.
Sometimes it is just that the login details do not match. Other times, it is something with cookies or sessions not working properly.
Plugins can also interfere here, especially anything related to security or login. In some cases, even a small change in settings can cause this kind of loop. It is not always clear at first. You just noticed that you cannot get in anymore.
What to check
Start with the basics and make sure the login details are actually correct.
If that is not the issue, then cookies and cache are worth checking. Sometimes clearing them changes things.
Plugins are another area. If there is a way to disable them from the file side, that can help figure out if one of them is causing it.
Also, check if anything was recently updated or changed around login or security settings.
Quick ways to fix
Try resetting the password and logging in again. If that does not change anything, clear the browser cache and cookies and try once more. If you can access the files, disable plugins and check if the login works. After that, it is mostly checking things step by step until access comes back.
Error #6: Slow WordPress Website
What you usually see
The site does load, but it feels slow. Pages take longer than usual. Sometimes it just keeps loading for a while before anything shows up. It might work fine one moment and then feel heavy the next time. It is not completely broken, but it does not feel right either.
Why it happens
There is usually more than one reason behind this. Sometimes it is too many plugins. Sometimes it is the hosting provider not keeping up. Large images can also slow things down without it being obvious at first.
In some cases, it starts after adding new features or content. Other times, it just builds up over time. It is not always one clear cause. A few small things together can make the site feel slow.
What to check
Plugins are a good place to start. If there are too many, or some of them are heavy, it can affect speed. Images are another thing. Large files can slow down page loading more than expected.
Hosting also matters here. If the server is slow, the site will feel slow no matter what. Caching is worth checking, too. If it is not set up properly, the site has to load everything again each time.
Quick ways to fix
Plugins are usually the first thing people look at. If there are quite a few, it is worth checking if all of them are really needed.
Images are another thing that sometimes gets ignored. Large files can slow things down more than expected, even if everything else looks fine.
If caching is not set up, adding it can change how the site feels, especially on repeated loads.
If none of that makes much difference, then it could be coming from the hosting side. At that point, it is more about trying a few changes and seeing what actually improves things.
Error #7: Plugin or Theme Conflicts
What you usually see
The site was working, then something changed.
A page looks different, a feature stops working, or something just feels off. Sometimes parts of the site load, but not everything. Other times, it breaks in a way that is not very clear.
It does not always show a proper error either. Things just stop behaving the way they used to.
Why it happens
This kind of issue often comes from things not working well together. A plugin, the theme, or something after an update. It is not always clear.
Sometimes it works fine, and then suddenly starts acting differently. No clear reason at first. So you end up going through things step by step to see what is causing it.
What to check
Plugins are the first place to look. If there are quite a few installed, it becomes harder to tell which one is causing the issue. Disabling them and checking the site can give some direction.
Themes can also be involved, especially if there are custom changes in them. Also worth thinking about what was added or updated recently. That usually gives a clue.
Quick ways to fix
Start by turning off plugins and checking if the issue goes away.
If it does, then turn them back on one by one and see when the problem comes back.
If plugins do not seem to be the reason, try switching the theme for a bit and check again. After that, it is mostly about narrowing it down slowly. One change at a time, then check.
Error #8: Memory Exhausted Error
What you usually see
The site starts loading, then stops halfway or shows a message about memory.
Sometimes it mentions something like “allowed memory size exhausted.” Other times, it just fails without saying much. It does not always break everything, but parts of the site may stop working.
Why it happens
This usually comes up when the site is trying to use more memory than it is allowed to. Plugins can add to it. Themes too. Sometimes it builds up slowly as more things are added to the site. It is not always one thing causing it. A few things together can push it over the limit.
What to check
Plugins are worth looking at first. If there are heavy ones or too many running at the same time, it can increase memory usage. Themes can also play a role, especially if they have a lot going on. Hosting limits matter here as well. Some setups have lower memory limits by default.
Quick ways to fix
One thing people try is increasing the memory limit in the config file.
If that is not possible or does not help, reducing the load can also make a difference. Fewer plugins, lighter setup.
If the issue keeps coming back, then it might be related to hosting limits. Then it becomes more about adjusting the setup or checking with the host.
Error #9: Stuck in Maintenance Mode
What you usually see
The site shows a message saying it is under maintenance.
Sometimes it just says “Briefly unavailable for scheduled maintenance,” and stays like that longer than expected.
Even after refreshing, it does not go away. The site just stays stuck on that screen.
Why it happens
This tends to happen after an update.
WordPress goes into maintenance mode for a short time, which is normal, but sometimes it does not come out of it.
Could be that the update stopped midway, or something just did not complete. So the site stays like that instead of going back to normal.
What to check
The first thing people look for is the .maintenance file in the root folder. If that file is still there, the site will keep showing that message. Also, worth checking if any update was running recently or got interrupted.
Quick ways to fix
If you can access the files, remove the .maintenance file and then check the site again. After that, it is a good idea to check if all updates are actually completed. If something was left halfway, running the update again can sometimes clear things up.
Error #10: Mixed Content (HTTP and HTTPS Issues)
What you usually see
You might see a warning in the browser, or the padlock icon may not show properly. Sometimes parts of the page load, but images or styles look broken. In some cases, only certain pages have this issue, while others seem fine.
Why it happens
Part of the site loads over HTTP while the rest uses HTTPS. Because of that, some elements do not load properly. You might notice images missing or styles not applying the way they should.
This often starts after switching the site to HTTPS, but a few older links are still left pointing to HTTP somewhere in the content or settings. Finding those links is not always straightforward.
What to check
Check if the site URL is set to HTTPS in WordPress settings. Also, look at images, scripts, or links that might still be using HTTP instead of HTTPS. Sometimes these are inside old content, sometimes inside WordPress theme or plugin settings.
Quick ways to fix
Start by updating the site URL to HTTPS if it is not already set. Then check the content and settings where old links might still be there.
Some people use plugins to fix mixed content issues, which can help in certain cases. After that, it is mostly about checking pages and seeing if everything loads properly.
Conclusion
WordPress errors are just part of running a site. Things break sometimes. It happens.
A lot of times, it looks bigger than it actually is. Then you check a few things, and it turns out to be something small.
Trying too many fixes together usually makes it worse. Better to try one thing, then check, then move to the next.
After going through this a few times, you kind of know where to look first. It becomes less confusing compared to the first time.
That is really all this comes down to. Knowing what to check and not panicking when something goes wrong.
Work with cmsMinds to handle fixes, updates, and improvements without the usual hassle.