Fix: Roblox Error Code 517

Have you run into 517 error code on Roblox? Don't worry. We'll explain here the problem and all the ways to fix it easily.

Like other software, Roblox isn’t expected to be bug-free and always work flawlessly, especially considering the platform’s complexity and user count.

However, some Roblox bugs and errors are disruptive and worrying, concerning users about why they’re suddenly unable to play the game in which they invested a lot of time and sometimes even funds.

This guide explains the 517 Roblox error, which stops users from participating in a game and is frequently mentioned on forums and community help sites.

If you’ve recently encountered this problem and require a solution, keep reading to learn more.

Let’s get started.

Table of ContentsShow

The Problem Explained

Roblox’s 517 error is a server-sided error occurring when the player tries joining a server or a private game someone on their friend list hosted.

There are two known messages associated with this error, and both point to the same error (though the root of the problem can be different):

  • This game has ended. (Error Code: 517)
  • This game is currently unavailable. Please try again later. (Error Code: 517)

It isn’t clear why the 517 Roblox error occurs, but there are two confirmed “triggers” for it based on what community members reported.

The first possible cause is:

The game’s servers are “late” updating the user’s session, so the game thinks the user is already in another session, and prevents them from joining one more.

In this scenario, the error message displayed is: “This game is not accessible at the moment. Please attempt again later. (Error Code: 517).”

Roblox Error Code 517

The second possible cause is:

The user tried joining a game that doesn’t have an updated status as “closed” yet was shut down recently by the owner. If you disconnect and refresh the game’s status you should notice it’s no longer available. Then, you can proceed with joining a different game.

In such a circumstance, the message displayed with the error is: “This game has concluded. (Error Code: 517)”.

Roblox Error Code 517 Image

Although this error looks a tad complicated to fix at first, it’s not difficult to solve it, as there are available solutions known to have helped many users. 

Discover more in the subsequent sections.

Fix 1: Ensure The Roblox Servers Are Up And Running

If the Roblox servers are experiencing issues or undergoing unexpected maintenance, you, as a user, may encounter many errors while trying to access the platform or join a server.

That is why, the first recommended move is ensuring the servers are up and running. You can do this on the official Roblox server status webpage.

In case you notice multiple reports of issues, there isn’t much to do besides waiting for the Roblox maintenance team to fix the problem.

However, if there are no reports and the status says “all systems operational,” you may proceed to the sections below.

Fix 2: Wait 15-20 Minutes And Do The Following While Waiting

One of the best ways to fix this problem, although it might come out a bit strange, is to simply “wait it out.”

If the Roblox servers are delayed confirming the player’s no longer in a game session, there’s nothing else to do besides waiting. Attempting to join another server or experience will simply make the error re-occur.

Users confirmed that the usual wait time for this error to resolve is about fifteen to twenty minutes. So, fully close Roblox and sign out of your account. Then, check the clock (or set a timer) and wait it out.

But, in the meantime, we recommend you do something that could potentially fix many network-related issues on your end (which may cause various problems while playing Roblox), and that is clearing your DNS Resolver Cache and restarting the router.

Here’s how to do that:

  1. Simultaneously press the Windows + S keys on your keyboard to open the Windows Search Box.
  2. Type Command Prompt, right-click the first result, and choose Run as Administrator, as shown in the images below.
    Windows Search Command Prompt
    Command Prompt
  3. Now that Command Prompt is open on your screen, type in the following command: “ipconfig /flushdns” and press Enter on your keyboard to initiate it. You will see a confirmation message, as shown in the image below.
    ipconfig /flushdns, Successfully flushed the DNS Resolver Cache

Now, it’s time to restart your router.

To accomplish that, locate the device’s power switch or button. It’s typically on the rear, but it varies for all models. Once you discover it, press/switch it, and the router will power off. You’ll observe the lights indicating an active network connection ceased functioning.

Just hold on for around five minutes and switch on the router again.

While waiting for the connection to renew, restart your PC.

Once your computer boots up and the connection restores, open Roblox on your computer and sign in to your account. The 517 error should no longer trouble you while trying to join a game.

This method worked for many users, but if it doesn’t help you, there are still others you can try in the following sections.

Fix 3: Clear Your Browser’s Cache Files And Cookies

You use a browser to access the Roblox website, which means you need to ensure there aren’t any issues with it caused by a pileup of corrupt cache data and cookies to have an error-free experience on the platform.

We recommend clearing your browser’s cache and cookies, and if you aren’t sure how, follow the steps below.

Note: This method is for the Chrome browser.

  1. Open Chrome and click the three vertical dots in the window’s top-right corner. Choose Settings from the list of options on the menu.
    Twitch Can Not Change Username
  2. Scroll down until you see the section named Privacy and Security. Click on Clear Browsing Data.
    Twitch Will Not Let Me Change Username
  3. Check the boxes next to all available options and select All time in the time range field. Then, finish by clicking Clear Data in the bottom-right corner.
    Clear Browser Cache On Google Chrome

Just refresh your browser and go to the Roblox site. The 517 issue should not happen anymore when attempting to join a server.

Fix 4: Clear Roblox’s Cache

Lastly, you can clear the Roblox cache files, which is a method that takes the longest but is guaranteed to fix the problem if it’s not directly related to the Roblox servers.

Here’s how you can clear the Roblox cache files:

  1. Simultaneously press the Windows + X buttons on your keyboard and choose Run from the list of available options, as shown in the image below.
    Windows + X Run
  2. In the Run box, type in “%tempRoblox” and press Enter or the OK button.
  3. Select all files within the Roblox Data Folder, and delete them.

Now launch Roblox again. The game will generate the cache files anew, and fix any problems that could’ve been caused by a pileup of corrupt cache data.

You should now be able to continue playing without experiencing the Roblox 517 error while attempting to join a server.


The 517 Roblox error can be “triggered” by a few reasons, at least that the community knows of. It’s a disruptive error that prevents the user from joining a game, but luckily, there are solutions for it.

Hopefully, the methods listed in this guide will help you overcome the problem and get back to playing without other interruptions.

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Bojan Veselinovikj

Bojan is a video-game developer and a tech enthusiast. Combining these two passions allow him to keep you informed on everything that's new in this fast-paced digital world.