Here are some suggestions:

• Reload this web page later.
• Check your Internet connection. Reboot any routers, modems or other network devices that you may be using.
• Add Google Chrome as a permitted programme in your firewall or antivirus software's settings. If it is already a permitted programme, try deleting it from the list of permitted programmes and adding it again.
• If you use a proxy server, check your proxy settings or contact your network administrator to make sure that the proxy server is working. If you don't believe you should be using a proxy server, adjust your proxy settings: Go to the spanner menu > Settings > + Show advanced settings > Change proxy settings... > LAN Settings and deselect the "Use a proxy server for your LAN" checkbox.