How to Solve HTTP Error 505 Version Not Supported - Oudel Inc. (2024)

HTTP Error 505 is a common error that occurs in web servers. A technical expert can easily solve this. Before knowing how to fix HTTP Error 505 Version Not Supported, one needs to know what HTTP, HTTP Error 505 means and the causes of this error. Before knowing how to fix HTTP Error 505 Version Not Supported, one needs to know what HTTP, HTTP Error 505 means and the causes of this error.

HTTP

HTTP is an acronym for Hypertext Transfer Protocol. It is a client-server protocol. Hypermedia documents such as HTML can be transmitted using an application-layer protocol known as HTTP. HTTP is a medium through which two unrelated objects can communicate. It was developed to facilitate communication between web servers and web browsers. There are different major and minor versions of the HTTP protocol. The World Wide Web (WWW) is built on HTTP. Hypertext links are used to load web pages using HTTP.

HTTP Error 505

HTTP error 505 is a web server error. The browser will display HTTP error 505 when a server either does not support or is unable or unwilling to complete the major version of HTTP used in the request message sent by the client. HTTP status codes are another name for web error codes. Depending on the type of error the user encounters, there are five distinct categories of HTTP status codes that always begin with a digit.

Open a telnet connection to some major website and run the following command to test it:

GET / HTTP/4.0

You may get the following response:

505 HTTP Version is Not Supported Server: HTTP/1.1 Cloudflare

Date: Mon, Dec 19, 2022, at 17:12:25 GMT Content-Type: HTML/text

Content-Length: 102

If you encounter this error in your web browser, try switching to a more recent version or a more recent version to see if it disappears. Additionally, if this error persists in your web browser, you should upgrade the software that runs your original web server so that it is compatible with the most recent version of the HTTP protocol that you require.

The supported protocols of your origin server should be listed in the error message. Consequently, to correct the error, we must check those protocols. The error may indicate specific program names that do not support the protocol. In that case, check the data to determine the source of the error. Additionally, avoid any whitespace after the HTTP version, as this may cause this error. Additionally, it is essential to ensure that the URL is correct and free of any special characters.

Steps are involved whenever a user interacts with a web server

  1. Find the site’s IP address by looking at its URL without the leading “http://” character Domain name servers (DNSs) provide this lookup or IP name to IP address conversion.
  2. Create a connection to an IP socket at that IP address
  3. Via that socket, you can write an HTTP data stream
  4. In response, receive an HTTP data stream from the web server The HTTP protocol assigns status code values to this data stream. Parse this data stream to find status codes and other useful information.

Cause of HTTP Error 505

  1. HTTP version is followed by a whitespace.
  2. URL is copied badly in the telnet connection.
  3. The web server is unable to complete the major version of HTTP.
  4. The client is not a web browser.

How to resolve HTTP error 505 from the client side

There are two easy solutions if your browser displays error 505.

  1. As a first step, check if you are using an older browser such as Microsoft’s Internet Explorer. Your browser is trying to connect to a modern web server using an older HTTP version in such cases Therefore, upgrading to a more up-to-date browser like Firefox or Google Chrome is the most effective solution to this problem.
  2. Errors like 505 “HTTP version not supported” can occur when the cache and website content do not always match the time. This is a server-side issue; If the problem persists after clearing the cache, there’s not much you can do about it. In Google Chrome, the cache can be cleared by following the steps: Open Chrome and click the three dots at the top right of the Google Chrome browser → More tools and → Clear browsing data → Choose Delete → Tick the boxes next to cookies, other site data, click Cached images and files → Clear data.

How to resolve HTTP Error 505 from the server side

The first step in troubleshooting the problem is to see which HTTP variant your web server uses. To accomplish this, use telnet on Windows or the curl command on Linux. We’ll talk about how to use the Linux command line to check the HTTP version, as there are plenty of online instructions on telnet.

We need to start in the terminal first. You can accomplish this in most distros by accessing the Applications menu by pressing Ctrl+Alt+T. Enter the command http://example.site/ in the terminal and press return. The “example.site” command should be replaced by your website address. When you run this command you will get a list of properties.

The following format will be used for the first line of the response: HTTP/#, where # refers to the web server’s version of HTTP. The HTTP version of our website is shown as 2. If this number is below 1.1. Modern browsers will not be able to properly interact with this number if it falls below 1.1. You need to update your web server to the latest version. Everything will be taken care of by updating your hosting control panel, such as Plesk or cPanel.

However, a problem with WordPress will require a different solution for a different reason

Problems can occur when WordPress plugins try to connect to third-party websites when traveling on an outgoing link. For example, suppose you want to direct your customers to your Amazon-sold products. While it’s perfectly acceptable to use static URLs for your products, people clicking on them from your website will get a 505 error.

This is usually the result of a plugin and the difference between the HTTP version of the third-party website and the actual destination. You can check this by using the curl above to compare the HTTP version of your website with the one you are linking to. There are two solutions to this problem. If you only use a few, we recommend turning off each plugin individually to identify issues. After that, you can use your option or code to replace it. You may have too many plugins to find the cause of the 505 error, or even if you do, you won’t be able to get rid of it. Although merely a workaround, the following approach may be worthwhile.

Start blogging on self-hosted WordPress on top-tier hardware with NVMe storage and minimal global latency. Always select your preferred distribution. Disabling the WordPress Link Checker, which detects and reports broken links, is the second step in this procedure. Most of the time, this is a useful tool that allows you to get rid of old and unwanted links. This can cause damage to your website if it starts reporting working links as broken due to plugins. False reports of broken links can make it impossible to conduct a real analysis of your website, and too many links that appear to be broken can hurt your SEO ranking. We need to disable link checkers for websites causing false alarms to avoid those websites. You can exclude working links from Link Checker by following the steps listed below after identifying all the links that continue to respond with a 505 error code:

WordPress Main Dashboard → Settings → Link checker → Links to check → Add the domain to the exclusion list → Save.

Conclusion

HTTP has many flaws. HTTP error 505 is a server error. Server Error 5xx consists of each error in the list. Some server errors are Error 500 (Server is unable to detect generic error messages), Error 501 (Server does not have enough power to execute the request), Error 502 (Invalid response received by server), Error 503 (Server overload), Error 504 (Server not able to detect requests at certain times), etc. For specific web error codes, there are specific troubleshooting steps. However, when users encounter such errors, they can also use standard repair methods to fix the error.

How to Solve HTTP Error 505 Version Not Supported - Oudel Inc. (2024)

FAQs

How to resolve HTTP 505 error? ›

Resolution through Clearing Cache: Clearing the browser's cache solves issues by deleting temporary files. Improved Website Access: When you clear the cache and visit the website again, your browser gets new data. This can fix the HTTP 505 error: Versions are not supported.

What is HTTP Error 505.0 HTTP version not supported? ›

At its core, the HTTP 505 error is a server response status code that signifies one critical point: the server cannot support the HTTP protocol version used in the client's request. Simply put, the server and the client's browser speak different versions of the HTTP language.

How do I stop error 505? ›

Go to your browser settings, locate the cache or browsing data section, and clear the cache. Afterward, try accessing the website again. Try a different browser: If you're encountering the error consistently in a specific browser, try using a different browser to see if the issue persists.

What is a 505 connection error? ›

The HyperText Transfer Protocol (HTTP) 505 HTTP Version Not Supported response status code indicates that the HTTP version used in the request is not supported by the server.

How do I fix HTTP errors? ›

The possible fixes for this issue are:
  1. Refreshing the page.
  2. Clearing the browser cache and cookies.
  3. Loading the page with a different network.
  4. Resetting permissions for files and folders.
  5. Updating the PHP version.
  6. Regenerating the . htaccess file or correcting errors in the . ...
  7. Disabling the third-party plugins.
Nov 30, 2022

What is error 505 server down? ›

The 505 error, specifically the 505 HTTP status code, signifies that the server either does not support or refuses to support the major version of the Hypertext Transfer Protocol (HTTP) in the request.

What is Curl HTTP status 505 HTTP version not supported? ›

In such cases, your browser is trying to connect to a modern web server using old HTTP versions. So, the best way to fix this is to switch to a modern browser like Firefox or Google Chrome. If you are using a modern browser and have faced error 505, then the quickest solution is to clear your browser's cache.

What does HTTP not supported mean? ›

On the other hand, a 505 HTTP Version Not Supported status code indicates that the server does not support the HTTP protocol version used in the request. This error occurs when the client attempts to use an HTTP protocol version that the server does not recognize or support.

What is 505 internal server error? ›

A 505 error in WordPress typically indicates an HTTP version not supported issue. This means that the server doesn't support the HTTP protocol version used in the request. To solve this error, you can try the following steps: Clear your browser cache: Sometimes, the error may be caused by a cache issue.

How to fix unknown error code during application install 505? ›

Part 2. 8 Basic Ways to Fix Error Code 505 (error code -505) on Google Play
  1. Clear Google Play Cache & Data. ...
  2. Update Date and Time. ...
  3. Enable Download Manager. ...
  4. Unmount your external Memory Card. ...
  5. Remove and Re-add your Google account. ...
  6. Reinstall Play Store Updates to Fix Error 505. ...
  7. Uninstall the Conflicting Apps.
Apr 18, 2024

What is a 505 gateway issue? ›

505 errors occur when a server doesn't support the HTTP protocol version used to lookup a website. 506 errors take place when transparent content negotiation for a request results in circular references. The request causes a loop that returns the error.

What is runtime error 505? ›

Causes of a 505 Error

The 505 error might occur if your server software is out-of-date and does not support the most recent HTTP version. Incompatible client software: The client software you are using to access a website may also be the cause of a 505 error.

What error code is 505? ›

Error code 505 typically indicates that the email server is unable to locate the recipient's mailbox. This could be due to a number of reasons, such as an incorrect email address or a problem with the recipient's email server.

What does 505 mean on a computer? ›

The 505 HTTP Version Not Supported response code means that the version of HTTP used in the request is not supported by the server.

How do I fix connectivity error? ›

Here are all our internet fixes in a simple list.
  1. Restart your equipment. ...
  2. Connect with an Ethernet cable. ...
  3. Check for an internet outage. ...
  4. Try using a different device. ...
  5. Check your wires and cables. ...
  6. Run your computer's internet troubleshooter. ...
  7. Reposition your router/gateway. ...
  8. Update everything.
Jan 4, 2024

How do I get rid of HTTP Error 500? ›

How to Fix a 500 Error
  1. Reload the page. You can do that by selecting the refresh/reload button, pressing F5 or Ctrl+R, or trying the URL again from the address bar. ...
  2. Clear your browser's cache. ...
  3. Delete your browser's cookies. ...
  4. Troubleshoot as a 504 Gateway Timeout error instead. ...
  5. Contact the website. ...
  6. Come back later.

What does status code 505 mean? ›

505 HTTP Version Not Supported status code is a server-side response code that indicates the server is either incapable or unwilling to support the version of the HTTP protocol used in a client's request.

How do I deal with HTTP Error 500? ›

How to Fix the “HTTP Error 500” as a visitor?
  1. Reload the page. ...
  2. Clear your browser cache and cookies. ...
  3. Visit the website using another network. ...
  4. Check the Error Logs of the Website. ...
  5. Reset File and Folder Permissions. ...
  6. Change the PHP version. ...
  7. Inspect or regenerate the . ...
  8. Repair the database or fix the database credentials.

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