Installing readxl, tidyveerse and devtools

Could you provide a reproducible example (reprex) of your attempt to install these packages? Being explicit about the code you tries to run and the exact messages you received will be informative to folks who can help.

Also could you provide a little system information:

  • RStudio Edition: (Desktop or Server)
  • RStudio Version:
  • OS Version:
  • R Version:
  • Your sessionInfo():

Having asked for all that, my best guess is that you're on windows and you are working a non-admin, limited user. If that's the case, be sure your user had the appropriate permissions. The easy solution is to install as admin.