RStudio Version 1.1.456 seems to have lost connectivity to the internet, which I found when trying to update my version of R using updateR(). I am not positive that this is the reason, but I recently downloaded Anaconda and since then I noticed something else funky with some console printouts in RStudio.
I am able to connect to the internet fine using R outside of RStudio. Also, I tried this:
Disabling firewall did nothing either.
edit: calling updateR() in RGui is not working actually, although I was able to install a package this way.