ERR_CONNECTION_TIMED_OUT – Website does not respond in a timely manner

The connection to the destination took too long.

Do not factory-reset a router speculatively or indiscriminately disable Wi-Fi security or a firewall. Get permission before changing someone else’s network.

Test a second website and another device on the same WiFi.
If all devices fail, check the router status and the Internet provider's fault page.
If only one side is affected, wait; Only check VPN or proxy specifically in the private network.

Test after each step and stop when the issue is solved. Checkmarks are not permanently saved.