Unable to install the development branch of 'rstanarm' on Win10

Summary:

I need to get access to the stan_surv() function from 'rstanarm' development package; however, I am unable to install it on my machine.

Description:

I tried to install 'rstanarm' to use it for Bayesian survival analysis in two ways:

1. devtools::install_github("stan-dev/rstanarm", build_vignettes = FALSE) -> It installed after uninstalling and re-installing many other packages like 'glue', 'ps', etc. But did not have 'stan_surv' function in the end.
   There was a warning too:

Warning message:
In utils::untar(tarfile, ...) :
  ‘tar.exe -xf "C:\Users\z3529455\AppData\Local\Temp\RtmpstuJZu\file755416331bd.tar.gz" -C "C:/Users/z3529455/AppData/Local/Temp/RtmpstuJZu/remotes75543a041272"’ returned error code 1

2. devtools::install_github("stan-dev/rstanarm",ref = "feature/survival", build_vignettes = FALSE) -> did not install with this error: installation of package ‘rstanarm’ had non-zero exit status.
   Here is the error:

Error: Failed to install 'rstanarm' from GitHub:
  (converted from warning) installation of package ‘C:/Users/z3529455/AppData/Local/Temp/RtmpstuJZu/file75541be324a9/rstanarm_2.19.1.tar.gz’ had non-zero exit status
In addition: Warning message:
In utils::untar(tarfile, ...) :
  ‘tar.exe -xf "C:\Users\z3529455\AppData\Local\Temp\RtmpstuJZu\file7554777d77a3.tar.gz" -C "C:/Users/z3529455/AppData/Local/Temp/RtmpstuJZu/remotes7554f9c35f"’ returned error code 1

Would someone please help me with that? I am in an urgent need!

R Version:

The version of R you are running (e.g., from getRversion())
3.6.3

Operating System:

My operating system is Windows10

Start with the two devtools::install_github commands in the report and reproduce the tar.exe extraction failure on R 3.6.3 under Windows 10. Inspect the installation output for the development branch and feature/survival ref to identify why the archive extraction fails; done means the branch installs successfully and exposes stan_surv().