API Download as ZIP /api.highcharts.com/zips/Highcharts-11.1.0-API.zip gives a 404 not found.
"Not Found The requested URL was not found on this server."
Thanks for pointing out this issue, indeed the API zip file is not available. It should automatically be deployed when the v11.1 has been released, so I've contacted the development team and they're on it. I'll let you know once the issue is resolved.
In case of any other questions, feel free to ask anytime.
Best regards!