Technologies

404 and 503 decoded: Here’s what those pesky internet error fails really mean

You can’t load a webpage you want, but those error codes are trying to tell you something. We’ll help you figure out what to do next.

It was Feb. 16 and I had two alarms set on my phone for Beyoncé’s Formation tour tickets. As they were bound to sell out in minutes, I was on the website, ready to refresh the page as soon as the clock struck 10 a.m. But when the critical moment came, the page only showed an ominous message: «503? Service requested is unavailable?» I refreshed the page frantically. What if I couldn’t get the tickets? Who knew when Beyoncé would tour again? But I got the same error over and over again.

I picked up my phone hoping to have more luck there, but I got the same message. Finally, after what felt like a bazillion refreshes and clicks, I was able to get through. There they were — the tickets I had been waiting months for. Whew! The purchase confirmation screen appeared and the nightmare ended. But I kept asking myself where that message came from. Was it something I did, or was the website just borked?

Those random-seeming website error numbers like 404, 503 and 301 you sometimes see after typing a URL can throw you off your groove or worse, ruin an urgent task (like buying Beyoncé tickets). Sometimes, like if you mistyped the URL, a simple text change can put you back in business. Other times, there may be a bigger issue — the server is down or there’s an internet outage.

To help you understand what to do the next time you see one of these online uh-ohs, I’ll break down the basics of those strange codes — even the ones that you might not be able to crack on your own. And if you’re fascinated by all of the code-lingo, you can always dig in deeper with a coding course for beginners.

404s and other common website errors: What they mean

Some website error codes are your fault (oops), but others are because of problems with the server that only the website’s administrator can fix. Chances are, you’ll see them with every refresh — it might help keep your annoyance at bay to understand why (but I doubt it).

404: One of the most common errors you’ll see, it means the page cannot be found. Nowadays, some sites will design its error code pages with cute puppies, links to other pages or a funny illustration to lighten your no doubt frustrated mood. Double-check the URL for typos and try again. If you’re typing the correct URL and you still have no luck, the page has been moved or deleted.

301: You may have heard of a «301 redirect,» but probably have never seen this code displayed on a site. Think of it as a smooth transition from one old URL to a new one, sort of like forwarding your mail. You should still see the webpage you wanted when this happens, but it likely has a different URL than the one you entered. It’s a permanent move, and even if you use the old URL, you’ll still be automatically routed to the new one. Bookmark the new URL for future reference.

400: This one is best known as a «bad request» for the user. On Google Chrome, you’ll get the message, «This page isn’t working at the moment» along with some guidance about contacting the website administrator. Usually, it’s caused by an error on your end. There may be a typo in the URL, the server may not understand your request, or the file you’re trying to upload is too big. Try clearing your cache and checking the URL for typos. If you have no luck, take Google’s advice.

410: This is the «Gone» status. You may see a message like, «This page does not exist,» or «Page deleted or gone.» There’s no problem on your end — you’ve got the right page, but the website administrator may have deleted it for good.

451: This code blocks you from seeing a URL for various legal reasons. According to a developer resource page from Mozilla (the maker of the Firefox browser), a person or organization may have made a legal demand to remove the content or the page may be blocked because of government censorship. You should see the legal reason on the page with the status code, but it’s not always guaranteed. If you’re determined to see the content, you may be able to get there with a few tech-savvy tactics — like a VPN or proxy server that acts as a tool to bypass the server’s restrictions.

503: You’ll likely see the message, «503 Service unavailable,» when a website’s server is down, so you won’t be able to access the site until it’s fixed. Reason being, the site’s server could be down for maintenance, too many people may be causing the site to overload, the site could have a bug or someone looking to cause trouble has taken the site offline. You won’t be able to access the site until it’s fixed so it’s best to try again later to see if the server issue is resolved.

200: This code you won’t see because it means that everything is OK. The site, its server and your browser are all working fine, so there’s no need to alert you there’s not a problem. The only place you’ll likely see it is in the code (or back end). In fact, most codes that start with a 2 are a good sign that the communication channel between your browser and the company’s server is working.

How can I fix website codes with images and videos?

It can be frustrating if you’re trying to play a video, upload or download media, but see error codes instead. More often than not it’s a user error, and it’s up to you to fix the problem. Sometimes you’ll see a small icon that looks like a picture in place of the video or image you’d hope to see. In that case, you’ll know something’s wrong.

If you get status code 415, it’s a red flag that the server doesn’t recognize the file type you’re using. Popular photo- and video-sharing sites will list the file types they support, typically on the Support page (here’s the list for YouTube). If yours isn’t listed, try converting the file to one of the approved formats before uploading it again.

Front end developer Allan Hernandez says that most common supported types are .mp3 and .mp4 for videos and .jpeg, .png, .svg and .web for images. If you’re uploading a video or image using one of the correct file formats, he says, it should be easy and error-free.

Another common problem occurs when you try to upload files that are too big for the server, also known as status code 413. In this case, it’s best to reduce the file size before uploading again.

Here are a few other common error codes you may come across with media and what they mean.

404: The media file has been moved or deleted.
403: The server cannot access your image or video — possibly because the firewall is blocking it.
429: You may have sent too many requests without giving the server time to process them. So, if you’ve clicked «upload» a bazillion times, you may get this code.

Are any errors my fault that I can fix?

Yes, there are two types of code errors: client and server. Most client errors start with a 4. You’ll need to fix something on your end before continuing. For example, the 403 code may mean the page is forbidden, or the web administrator restricts access to that page. You’ll need to go to another page or site.

Usually, if there’s an error, you’ll need to do one of these things.

1. Restart your computer, modem or router.

2. Check the URL for typos.

3. Visit a different URL.

Sometimes, other actions may be required, such as you need to pay to see gated content or, if you’ve clicked a button constantly, you just need to wait patiently because the request isn’t processing fast enough.

If an error starts with a 5, it’s the server’s problem and there may not be much you can do. Try contacting the website’s support to let them know you’re getting a server error.

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Technologies

This $20K Humanoid Robot Promises to Tidy Your Home. But There Are Strings Attached

The new Neo robot from 1X is designed to do chores. It’ll need help from you — and from folks behind the curtain.

It stands 5 feet, 6 inches tall, weighs about as much as a golden retriever and costs near the price of a brand-new budget car.

This is Neo, the humanoid robot. It’s billed as a personal assistant you can talk to and eventually rely on to take care of everyday tasks, such as loading the dishwasher and folding laundry.

Neo doesn’t work cheap. It’ll cost you $20,000. And even then, you’ll still have to train this new home bot, and possibly need a remote assist as well.

If that sounds enticing, preorders are now open (for a mere $200 down). You’ll be signing up as an early adopter for what Neo’s maker, a California-based company called 1X, is calling a «consumer-ready humanoid.» That’s opposed to other humanoids under development from the likes of Tesla and Figure, which are, for the moment at least, more focused on factory environments.

Neo is a whole order of magnitude different from robot vacuums like those from Roomba, Eufy and Ecovacs, and embodies a long-running sci-fi fantasy of robot maids and butlers doing chores and picking up after us. If this is the future, read on for more of what’s in store.

Don’t miss any of our unbiased tech content and lab-based reviews. Add CNET as a preferred Google source.

What the Neo robot can do around the house

The pitch from 1X is that Neo can do all manner of household chores: fold laundry, run a vacuum, tidy shelves, bring in the groceries. It can open doors, climb stairs and even act as a home entertainment system.

Neo appears to move smoothly, with a soft, almost human-like gait, thanks to 1X’s tendon-driven motor system that gives it gentle motion and impressive strength. The company says it can lift up to 154 pounds and carry 55 pounds, but it is quieter than a refrigerator. It’s covered in soft materials and neutral colors, making it look less intimidating than metallic prototypes from other companies.

The company says Neo has a 4-hour runtime. Its hands are IP68-rated, meaning they’re submersible in water. It can connect via Wi-Fi, Bluetooth and 5G. For conversation, it has a built-in LLM, the same sort of AI technology that powers ChatGPT and Gemini.

The primary way to control the Neo robot will be by speaking to it, just as if it were a person in your home.

Still, Neo’s usefulness today depends heavily on how you define useful. The Wall Street Journal’s Joanna Stern got an up-close look at Neo at 1X’s headquarters and found that, at least for now, it’s largely teleoperated, meaning a human often operates it remotely using a virtual-reality headset and controllers.

«I didn’t see Neo do anything autonomously, although the company did share a video of Neo opening a door on its own,» Stern wrote last week.

1X CEO Bernt Børnich told her that Neo will do most things autonomously in 2026, though he also acknowledged that the quality «may lag at first.»

The company’s FAQ says that for any chore request Neo doesn’t know how to accomplish, «you can schedule a 1X Expert to guide it» to help the robot «learn while getting the job done.»

What you need to know about Neo and privacy

Part of what early adopters are signing up for is to let Neo learn from their environment so that future versions can operate more independently.

That learning process raises privacy and trust questions. The robot uses a mix of visual, audio and contextual intelligence — meaning it can see, hear and remember interactions with users throughout their homes.

«If you buy this product, it is because you’re OK with that social contract,» Børnich told the Journal. «It’s less about Neo instantly doing your chores and more about you helping Neo learn to do them safely and effectively.»

Neo’s reliance on human operation behind the scenes prompted a response from John Carmack, a computer industry luminary known for his work with VR systems and the lead programmer of classic video games including Doom and Quake.

«Companies selling the dream of autonomous household humanoid robots today would be better off embracing reality and selling ‘remote operated household help’,» he wrote in a post on the X social network (formerly Twitter) on Monday.

1X says it’s taking steps to protect your privacy: Neo listens only when it recognizes it’s being addressed, and its cameras will blur out humans. You can restrict Neo from entering or viewing specific areas of your home, and the robot will never be teleoperated without owner approval, the company says.

But inviting an AI-equipped humanoid to observe your home life isn’t a small step.

The first units will ship to customers in the US in 2026. There is a $499 monthly subscription alternative to the $20,000 full-purchase price, though that will be available at an unspecified later date. A broader international rollout is promised for 2027.

Neo’s got a long road ahead of it to live up to the expectations set by Rosie the Robot in The Jetsons way back when. But this is no Hanna-Barbera cartoon. What we’re seeing now is a much more tangible harbinger of change.

Technologies

I Wish Nintendo’s New Switch 2 Zelda Game Was an Actual Zelda Game

Hyrule Warriors: Age of Imprisonment has great graphics, a great story and Zelda is actually in it. But the gameplay makes me wish for another true Zelda title instead.

I’ve never been a Hyrule Warriors fan. Keep that in mind when I say that Nintendo’s new Switch 2-exclusive Zelda-universe game has impressed me in several ways, but the gameplay isn’t one of them. Still, this Zelda spinoff has succeeded in showing off the Switch 2’s graphics power. Now can we have a true Switch 2 exclusive Zelda game next?

The upgraded graphics in Tears of the Kingdom and Breath of the Wild has made the Switch 2 a great way to play recent Zelda games, which had stretched the Switch’s capabilities to the limit before. And they’re both well worth revisiting, because they’re engrossing, enchanting, weird, epic wonders. Hyrule Warriors: Age of Imprisonment, another in the Koei-Tecmo developed spinoff series of Zelda-themed games, is a prequel to Tears of the Kingdom. It’s the story of Zelda traveling back in time to ancient Hyrule, and the origins of Ganondorf’s evil. I’m here for that, but a lot of hack and slash battles are in my way.

A handful of hours in, I can say that the production values are wonderful. The voices and characters and worlds feel authentically Zelda. I feel like I’m getting a new chapter in the story I’d already been following. The Switch 2’s graphics show off smooth animation, too, even when battles can span hundreds of enemies.

But the game’s central style, which is endless slashing fights through hordes of enemies, gets boring for me. That’s what Hyrule Warriors is about, but the game so far feels more repetitive than strategic. And I just keep button-mashing to get to the next story chapter. For anyone who’s played Hyrule Warriors: Age of Calamity, expect more of the same, for the most part.

I do like that the big map includes parts in the depths and in the sky, mirroring the tri-level appeal of Tears of the Kingdom. But Age of Calamity isn’t a free-wandering game. Missions open up around the map, each one opening a contained map to battle through. Along the way, you unlock an impressive roster of Hyrule characters you can control.

As a Switch 2 exclusive to tempt Nintendo fans to make the console upgrade, it feels like a half success. I admire the production values, and I want to keep playing just to see where the story goes. But as a purchase, it’s a distant third to Donkey Kong Bananza and Mario Kart World.

Hyrule Warriors fans, you probably know what you’re probably in for, and will likely get this game regardless. Serious Zelda fans, you may enjoy it just for the story elements alone.

As for me? I think I’ll play some more, but I’m already sort of tuning the game out a bit. I want more exploration, more puzzles, more curiosity. This game’s not about that. But it does show me how good a true next-gen Zelda could be on the Switch 2, whenever Nintendo decides to make that happen.