Unable to install package pillar

[Ramesh]

Hi I am new to R! Very much making baby steps and trying to learn on online courses.

Trying to do a meta-analysis and to do so I need to use the 'metamisc' package.

It was working fine then I came back to work on it and found the following whne trying to reload the packages I needed:

library(metamisc)
library(dplyr)
install.packages("runjags")
install.packages("rjags")
library(runjags)
library(rjags)
library(ggplot2)
library(gridExtra)

But I then get error codes like this :

> library(metamisc)
Error: package or namespace load failed for ‘metamisc’ in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]):
 there is no package called ‘pillar’
In addition: Warning message:
package ‘metamisc’ was built under R version 3.6.3

I tried:

install.packages("pillar", dependencies = TRUE)

But got error code:

# install.packages("devtools")
devtools::install_github("r-lib/pillar")

But got error code:

> install.packages("pillar", dependencies = TRUE)

  There is a binary version available but the source version is later:
       binary source needs_compilation
pillar  1.6.0  1.6.1             FALSE

installing the source package ‘pillar’

trying URL 'https://cran.rstudio.com/src/contrib/pillar_1.6.1.tar.gz'
Content type 'application/x-gzip' length 1111747 bytes (1.1 MB)
downloaded 1.1 MB

Error in setwd("M:") : cannot change working directory
Execution halted
Warning in install.packages :
  installation of package ‘pillar’ had non-zero exit status

The downloaded source packages are in
	‘C:\Users\umrna\AppData\Local\Temp\RtmpugaXQt\downloaded_packages’

Finally tried:

# install.packages("devtools")
devtools::install_github("r-lib/pillar")

But got error code:

Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) : 
  there is no package called ‘cachem’

Are there any recommendations on how to get around this problem? My working directory was working fine for installing before and when I use setwd() and getwd() it works fine.

I'd be very grateful for any help!

Many thanks

Ramesh