Following is the error message generated whenever I try to install any packages:
Warning in install.packages :
unable to access index for repository https://cran.rstudio.com/src/contrib: cannot open URL 'https://cran.rstudio.com/src/contrib/PACKAGES'
Warning in install.packages :
package ‘shiny’ is not available for this version of R
A version of this package for your version of R might be available elsewhere, see the ideas at https://cran.r-project.org/doc/manuals/r-patched/R-admin.html#Installing-packages
Warning in install.packages :
unable to access index for repository https://cran.rstudio.com/bin/windows/contrib/4.2: cannot open URL 'https://cran.rstudio.com/bin/windows/contrib/4.2/PACKAGES'