OS: Ubuntu 18.04.3 LTS
I've installed the prerequisite r-base and the rstudio's deb package without a problem. However, when I open a menu option in RStudio which then opens a Gnome dialog, the dialog popup could only be closed but it would not accept any mouse clicks.
For example, trying to set the 'Default working directory (when not in project)' in 'Tools -> Global Options -> General'. The 'Browse' button opens a Gnome dialog listing the content of the home directory. The dialog window would not respond to any mouse clicks, except on 'Cancel', and thus no selection can be made.
There is an error printed in the linux terminal:
Gtk-Message: GktDialog mapped without a transient parent. This is discouraged.