AoW switches to using ConanSandboxServer-Win64-Shipping.exe (instead of ConanSandboxServer-Win64-Test.exe) and 1.7.1 utilizes that new binary. First check to see you have Win63-Shopping and not Win64-Test.exe. If not I know this isn’t “port” related, but have you ensured that your firewall has made an exception for the new binary? (e.g. Control Panel > System & Security > Windows Defender Firewall > Allow an app or feature through Windows Defender firewall)