I was using RStudio 1.2.1335 on a fresh install of Ubuntu 18.04.2, but whenever I installed a package in RStudio, my entire desktop would freeze and stay frozen until I forced a system restart. This happened 2 or 3 times before I purged and installed the latest stable RStudio 1.1.
RStudio 1.1 isn't working for me either, but for different reasons.