Unable to install packages on R studio version 3.4.4

[jcblum]

This StackOverflow answer collects a range of things to try when facing this problem:

Unable to install packages in latest version of RStudio and R Version.3.1.1

link shamelessly stolen from @EconomiCurtis's post in a similar thread:

Odd behavior in RStudio

Some system Information could be useful as well

#### System Information: - RStudio Edition: (Desktop or Server) - RStudio Version: - OS Version: - R Version: #### Also: <!-- Depending on your issue, the following may be useful /--> <!-- If a section isn't relevant or you can't collect it just delete that section below /--> - RStudio diagnostics report: <!--see rstd.io/support-diagnostics-report /--> - Your `sessionInfo()`: - RStudio crash report: <!-- rstd.io/support-crash-report /--> - RStudio application log files: <!-- rstd.io/support-ide-log-files /-->

There is some discussion here: https://stackoverflow.com/a/33685721/2093559