The proxy server encountered an error..

Hello

If you are using Internet Explorer, do the following:
1 If you are using Internet Explorer.
Click on → Start → Control Panel.
Then → Network and Internet, then → Internet Options.
You will open the Internet Options window.

2 Click on the → Connections tab.
At the bottom, a box is visible → Local Area Network Settings.
Click on the → LAN Settings button.
You will open a dialog box.

3 Uncheck the box next to → Use a proxy server for your local network.
Click OK to exit the dialog box.
Click OK again in the Internet Properties window.
The proxy server is disconnected.

For other browsers see: https://forums.commentcamarche.net/forum/affich-37640573-desactiver-son-proxy

Hello,

I had the same issue on Windows 10. It turns out to be a malware that blocks your access to network settings (after doing some research)

I reinstalled Windows because none of the current tools work to fix the problem.

I advise you in the future not to use Windows Defender (recent vulnerability, see articles on the web, for example: https://www.ginjfo.com/actualites/securite-informatique/windows-defender-un-correctif-de-securite-se-deploie-en-urgence-20180404 but rather to use an antivirus like Avast: (ranking on av-test.org) https://www.av-test.org/fr/antivirus/particuliers-windows/

Have a good day.