no able to install

[wulixin]

#devtools::install_github("Ryo-N7/tvthemes")
devtools::install_github("hadley/emo")
Downloading GitHub repo hadley/emo@master
These packages have more recent versions available.
Which would you like to update?

1: assertthat (0.2.0 -> 0.2.1 ) [CRAN]
2: purrr (0.3.1 -> 0.3.2 ) [CRAN]
3: Rcpp (1.0.0 -> 1.0.1 ) [CRAN]
4: rlang (0.3.1 -> 0.3.4 ) [CRAN]
5: stringi (1.3.1 -> 1.4.3 ) [CRAN]
6: glue (1.3.1 -> ea0edcb2e...) [GitHub]
7: CRAN packages only
8: All
9: None

Enter one or more numbers separated by spaces, or an empty line to cancel
1: 9
√ checking for file 'C:\Users\cmbcwulixin\AppData\Local\Temp\RtmpEJGW4v\remotes34f864641c9a\hadley-emo-02a5206/DESCRIPTION' ...

• preparing 'emo': (611ms)
  √ checking DESCRIPTION meta-information ...
• checking for LF line-endings in source and make files and shell scripts (469ms)
• checking for empty or unneeded directories
• looking to see if a 'data/datalist' file should be added
• building 'emo_0.0.0.9000.tar.gz'

• installing source package 'emo' ...
  ** R
  Error : (由警告转换成)无法重新编码'jis.R'行3
  ERROR: unable to collate and parse R files for package 'emo'
• removing 'D:/R-3.5.3/library/emo'
  In R CMD INSTALL