Direct http access to SQL Server was deprecated a few releases ago and does not exist in SQL 2012. I would advise you look for an alternative solution that will continue to work after you have upgraded to a more recent version of SQL Server.
Original author: https://github.com/SQL-FineBuild/Common/wiki/ 1-click install and best practice configuration of SQL Server 2019, 2017 2016, 2014, 2012, 2008 R2, 2008 and 2005.
When I give food to the poor they call me a saint. When I ask why they are poor they call me a communist - Archbishop Hélder Câmara