Installation failure for msmbstyle

[dkStevensNZed]

I'm trying to install the msmbstyle package using the commands recommended:

install.packages("remotes")
remotes::install_github("grimbough/msmbstyle")

and I'm met the the error and I'm dead in the water. I'm in Windows 10, R v 3.6.2, RStudio v 1.2.5033.

Downloading GitHub repo grimbough/msmbstyle@master
✓ checking for file 'C:\Users\David Stevens\AppData\Local\Temp\Rtmp44RC2N\remotes4d45b0ad94\grimbough-msmbstyle-1560d18/DESCRIPTION' ...
─ preparing 'msmbstyle':
✓ checking DESCRIPTION meta-information ...
─ checking for LF line-endings in source and make files and shell scripts
─ checking for empty or unneeded directories
─ building 'msmbstyle_0.0.12.tar.gz'

Installing package into ‘C:/Users/David Stevens/Documents/R/win-library/3.6’
(as ‘lib’ is unspecified)

• installing source package 'msmbstyle' ...
  ** using staged installation
  ** R
  ** inst
  ** byte-compile and prepare package for lazy loading
  ARGUMENT 'Stevens\AppData\Local\Temp\RtmpSeaFGH\Rin78c68ea455e' ignored

Error: unexpected symbol in "Microsoft Windows"
Execution halted
ERROR: lazy loading failed for package 'msmbstyle'

• removing 'C:/Users/David Stevens/Documents/R/win-library/3.6/msmbstyle'
  Error: Failed to install 'msmbstyle' from GitHub:
  (converted from warning) installation of package ‘C:/Users/David Stevens/AppData/Local/Temp/Rtmp44RC2N/file4d47bc8758c/msmbstyle_0.0.12.tar.gz’ had non-zero exit status

Any ideas what's going wrong?

Best
David Stevens