Windows: Settings → Network & internet → Proxy, turn off Use a proxy server and setup scripts unless your workplace needs them. Also check inetcpl.cpl → Connections → LAN settings and untick any proxy there, then restart Chrome. If the setting returns by itself, scan for malware.

ERR_PROXY_CONNECTION_FAILED, explained

Chrome uses the system proxy settings. If a VPN/proxy app was removed improperly, or adware set a proxy, Chrome tries to reach a server that isn't there and fails with this error.

Signs of the problem

  • “No internet. There is something wrong with the proxy server… ERR_PROXY_CONNECTION_FAILED”.

What causes ERR_PROXY_CONNECTION_FAILED

  • Leftover proxy from VPN/proxy apps.
  • Corporate proxy unreachable off-network.
  • Adware setting a proxy.

Fixes to try, in order

  1. Turn off the proxyWindows Settings → Proxy; Mac: System Settings → Network → your connection (Wi-Fi or Ethernet) → Details → Proxies.
  2. Check Internet OptionsRun inetcpl.cpl → Connections → LAN settings and untick Use a proxy server; also run the commands below to clear the system services' proxy and DNS cache.
  3. Uninstall VPN/proxy appsRemove ones you don't use.
  4. Scan for adwareRun a Microsoft Defender full scan and check browser extensions.

Command

netsh winhttp reset proxy
ipconfig /flushdns

Elevated Command Prompt.

Check it's fixed: Websites load in Chrome without the proxy error.

Prevent it from coming back

Uninstall VPN/proxy tools properly and avoid unknown 'free VPN' extensions.