How do I flush my DNS cache to resolve the error?

Flushing your DNS cache can remove outdated or corrupted DNS information. Open Command Prompt as an administrator (search for 'cmd', right-click, and select 'Run as administrator'). Type `ipconfig /flushdns` and press Enter. This will clear the DNS resolver cache. You can also try `ipconfig /registerdns` and `nbtstat -R`.