Cant install

[screig]

Hi

I am trying to follow the instructions for downloading:

# Optionally you may remove a prior package
remove.packages('rClr')
library(devtools)
install_github("jmp75/rClr", build_vignettes=TRUE)

I'm not sure but is this error on myside?

Downloading github repo jmp75/rClr@master
Error in curl::curl_fetch_memory(url, handle = handle) : 
  Peer certificate cannot be authenticated with given CA certificates

[jmp75]

I note that the question went through stackoverflow and one reply is marked as answer - need to update documentation. Stackoverflow thread