[macOS Catalina] New Hugo site: localhost:1313 fails to open but 127.0.0.1:1313 works

This appears to be more of a Catalina issue than a Hugo one:

https://discussions.apple.com/docs/DOC-250001766

https://mallinson.ca/posts/7/local-web-development-with-mac-os-catalina

Additionally, you could try:

hugo server -D --baseURL "http://alexanders-Mac-mini.local"

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