# Google Chrome error: ERR_QUIC_PROTOCOL_ERROR

> Fix the ERR_QUIC_PROTOCOL_ERROR message in Google Chrome by turning off the QUIC protocol or checking your network.

Source: https://helpcenter.ruachost.com/developers/networking/google-chrome-error-message-err-quic-protocol-error/

When browsing the internet with **Google Chrome**, you may encounter the error:

```
This site can’t be reached.
The webpage at https://example.com might be temporarily down or it may have moved permanently to a new web address.
ERR_QUIC_PROTOCOL_ERROR
```

## Cause

- The error is related to **QUIC (Quick UDP Internet Connections)**, an experimental protocol developed by Google.
- QUIC uses **UDP** instead of **TCP** to improve performance for web applications.
- Although enabled by default in Chrome, QUIC is not essential for browsing and can sometimes cause connection issues.

## Resolution Methods

### Method 1: Disable QUIC in Google Chrome

1. In the Chrome address bar, type:

   ```
   chrome://flags
   ```
2. Press **Enter**.
3. In the search box, type **quic**.
4. Locate **Experimental QUIC protocol**.
5. Change the setting to **Disabled**.
6. Click **Relaunch** to restart Chrome.

### Method 2: Disable Extensions in Chrome

Sometimes a browser extension conflicts with QUIC.

1. In the Chrome address bar, type:

   ```
   chrome://extensions
   ```
2. Press **Enter**.
3. Use the blue slider to disable extensions one by one.
4. Test after disabling each extension to identify the culprit.

### Method 3: Disable Proxy Server (Windows Only)

If you’re on Windows, a proxy configuration may cause the error.

1. Open the **Control Panel**.
2. Go to **Internet Options → Connections tab → LAN settings**.
3. Uncheck **Use a proxy server for your LAN**.
4. Click **OK** and restart your computer.