installation does not work

Hello, when I try to install the software with this code:

`devtools::install_github('jlaffy/infercna')`

I get the following cryptic error:

Downloading GitHub repo jlaffy/infercna@HEAD
Error in utils::download.file(url, path, method = method, quiet = quiet,  : 
  download from 'https://api.github.com/repos/jlaffy/infercna/tarball/HEAD' failed