Cannot download package in Rstudios

Error Information:

unable to access index for repository https://cran.rstudio.com/src/contrib:
cannot open URL 'https://cran.rstudio.com/src/contrib/PACKAGES'

Hello !

It is a common issue for which you'll find answer on this website.

You may have a proxy / firewall that is preventing you to get internet access. You should configure it.

Please look for other threads in the community website to find related issues disussion.

Thanks!