How to Resolve a “No Healthy Upstream” Error

Resolve connection issues with your favorite websites

Co-authored by Travis Boylls Reviewed by Stan Kats

Last Updated: August 18, 2025 Fact Checked

A “No Healthy Upstream” error occurs when your computer or device is having trouble connecting to a server. This may be a problem with the server itself, or you may have a network connection issue. There are a few things you can do to try to fix this error. This wikiHow article teaches you how to troubleshoot and resolve a “No healthy upstream” error.

Troubleshooting “No Healthy Upstream”

In most cases, an administrator or IT professional needs to fix the problem. Wait and try again later. If it continues, contact customer service. If it’s happening across multiple websites, restart your computer and router. Flush your DNS. Reset your network settings and clear your browser cache.

1

Try again later.

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In most cases, when you get a “No healthy upstream” error, the problem is with the backend server. An administrator or IT professional needs to fix the problem. There’s not much you can do on your end. All you can do is wait and try again later. If you are having this issue across multiple websites and services, then this could indicate there is an issue with your internet connection or network configuration.

2

Restart the problematic app.

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You can try to fix glitches by restarting the app you are having an issue with. Close the app or the web browser in which you are experiencing the problem. Then open the app or go to the website and try again.

3

Restart your computer.

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The easiest way to fix minor glitches with your computer is to restart it. This will clear your memory and clear out any minor temporary bugs your computer may be experiencing. You can restart your computer by clicking the power icon in the Windows Start menu or the Apple icon on Mac. Then click Restart.

4

Restart your router.

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You can generally fix minor internet errors by restarting your modem or router. To do so, unplug your modem or router for about 30 seconds. Then plug it back in. Wait a full minute for your router to boot back up. Then try again.

5

Update your browser.

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Your web browser may be outdated. If your web browser is outdated, it may not function properly. Use one of the following steps to check for updates and update your web browser:
- Chrome: Click the icon with three dots (⋮) in the upper-right corner. Then click Help, followed by About Google Chrome. This will check for updates automatically. If an update is found, wait for it to finish installing. Then click Relaunch to restart Google Chrome.
- Microsoft Edge: Click the icon with three dots (•••) in the upper-right corner. Then click Help and feedback, followed by About Microsoft Edge. Microsoft Edge will check for updates and install them automatically. If an update is found, click Restart when it is finished installing.
- Safari: To update Safari, check for macOS updates. To do so, click the Apple icon followed by System Settings. Click General, followed by Software updates. Click Update now if an update is available.
- Firefox: Click the icon with three lines (☰) in the upper-right corner. Click Help, followed by About Firefox. Firefox will automatically check for and download the latest updates. Click Restart to update Firefox when the update is finished downloading.

6

Flush your DNS.

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Your DNS cache may be corrupt or outdated. If your DNS cache is corrupt, it can cause problems when trying to connect to websites. Also, if the website has changed its IP address, your DNS cache may not have been updated to reflect the change. You can fix this issue by flushing your DNS settings. Use one of the following steps to do so:^{[1]
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- Windows:
  - Open the Windows Start menu.
  - Type CMD.
  - Right-click the Command Prompt and click Run as Administrator.
  - Type ipconfig /flushdns and press Enter.
  - Type netsh winsock reset and press Enter.
  - Restart your computer.
- Mac:^{[2]
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  - Click the Magnifying Glass/Spotlight icon in the menu bar at the top.
  - Type Terminal.
  - Open the Terminal app.
  - Type sudo killall -HUP mDNSResponder && echo macOS DNS Cache Reset and press Enter.
  - Enter an administrative password.
  - Reset your computer.

7

Reset your network settings.

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Your network settings may not be configured correctly. You can generally fix issues with your network configuration by resetting your network settings to their default settings. You will need to log back in to your Wi-Fi network after doing this. Make sure you have your Wi-Fi network name and password in hand. Use one of the following steps to reset your network connections:
- Windows: Click the Windows Start menu and type “Network reset”. Click Network reset, and click Reset now. Follow the prompts and restart your computer.
- Mac: Open the Finder and click Go. Click Go to folder, enter “/Library/Preferences/SystemConfiguration,” and press Enter. Delete the following files from the folder and then restart your computer:
  - CaptiveNetworkSupport
  - com.apple.network.eapolclient.configuration
  - com.apple.airport.preferences.plist
  - preferences.plist
  - NetworkInterfaces.plist

8

Clear your browser cache.

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Your cache may be corrupt. Your browser cache stores temporary data. This is meant to improve your browser speed. However, over time, your browser cache can become corrupt and cause problems with certain websites and services. Clearing your cache can help fix these problems. Use one of the following steps to clear your browser cache:^{[3]
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- Chrome: Press Ctrl + H (or Command + H on Mac) to open your history. Click Delete browsing data in the menu bar to the left. Select “All time” in the drop-down menu next to “Time range.” Then click Delete data.
- Microsoft Edge: Press Ctrl + H (or Command + H on Mac) to open your history. Click the trashcan icon at the top of the menu. Select “All time” in the drop-down menu below “Time range,” and click Clear now.
- Safari: The quickest way to clear your cache on Safari is to press Option + Command + E on the keyboard.^{[4]
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- Firefox: Press Ctrl + Shift + H (or Command + Shift + H on Mac). Right-click each of the time frames in the menu bar to the left and click Delete.

9

Contact an administrator.

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If the problem continues, you’ll need to contact the administrator or customer service for the website or service you are trying to connect to and let them know of the problem. They may not be aware of it. If this is happening at your work, contact your network administrator. Let them know what is going on.