RstudioServer doesn't show graphics in the plot pane while save results automatically to current working directory

Description of issue -

Hello all,
I have trouble in dealing with R studio server built on the virtual environment.
My R studio IDE doesn't show the visualization result right on the IDE screen (plots pane), but rather save the results automatically to the working directories folder.

I built R studio server in the Virtual Machine environment that are constructed on the SDN (software defined network)
My SDN doesn't support online network connection,
so I use VDI to connect my local PC with SDN.
SDN is built on the Red hat linux version 7.8.

I have searched for similar situations and followed suggested tips such as using R notebook or changes the setting a bit, which all turn out to be not working in my case.
Is there any recommended solutions available?

System Information:

  • RStudio Edition: server
  • RStudio Version: R version 3.6.3 (2020-02-29)
  • OS Version: Red Hat Enterprise Linux Server 7.8
  • R Version:
  • sessionInfo():
    x86_64-pc-linux-gnu

Referred here from support.rstudio.com