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I get the following error when trying to use devtools:install_github with R 3.4.1 on Windows 7:

> devtools::install_github("baptiste/ggflags")
Installation failed: error setting certificate verify locations:
  CAfile: /mingw32/ssl/certs/ca-bundle.crt
  CApath: none

However, the exact same command works fine on the same system using R 3.3.2. The .Rprofiles are identical for both installations. I've tried re-installing RCurl as per this post, to no avail.

user2987808
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1 Answers1

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For me this error was connected to proxy server settings.

This worked: https://github.com/jeroen/curl/issues/116

Edit your environ file - file.edit('~/.Renviron') - to change your https proxy accordingly

northeastloon
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