FactSet R Plugin not recognized in RStudio

Hi All,
I am using RStudio (V1.3.959) and FactSet R plugin (V3.6.2) from long time. Few weeks back, system got updated and then onwards RStudio is no longer able to connect with FactSet using FactSet R plugin.

surprisingly, FactSet R plugin is working fine in R but not in R Studio.

Your help is much appreciated.
Thank in advance for help.