I cannot install statsr

[dohjung]

Hello, I tried to install this package for Bayesian statistics course, but I failed. The error messages are as follows.

install_github("StatsWithR/statsr")
Downloading GitHub repo StatsWithR/statsr@master
from URL https://api.github.com/repos/StatsWithR/statsr/zipball/master
Installing statsr
"d:/Program Files/R/R-3.4.1/bin/x64/R" --no-site-file
--no-environ --no-save --no-restore --quiet CMD INSTALL
"C:/Users/Soonkyo
Jug/AppData/Local/Temp/RtmpgPV4IR/devtools430149375df/StatsWithR-statsr-6f64cf2"
--library="d:/Program Files/R/R-3.4.1/library"
--install-tests

'd:\Program' is not recognized as an internal or external command,
operable program or batch file.
Installation failed: Command failed (1)

You also mentioned how to fix it as follows but I could not find the answer.
"If install_github breaks on Windows with UNC network paths or sometimes when there are places in the path name, you may follow our mentor David Hood's (thanks, David) solution here in course 1."

Everything except statsr was installed without error. Please let me know how to fix it.
Thank you.