rstudio desktop Linux 1.2.5001 requires X11 display, how to start web only?

RStudio Desktop OS: Linux Ubuntu, installed from tarball,

rstudio
qt.qpa.screen: QXcbConnection: Could not connect to display
Could not connect to any X display.
rstudio
qt.qpa.screen: QXcbConnection: Could not connect to display
Could not connect to any X display.
rstudio
qt.qpa.screen: QXcbConnection: Could not connect to display
Could not connect to any X display.
rstudio --help
qt.qpa.screen: QXcbConnection: Could not connect to display
Could not connect to any X display.
rstudio --version
qt.qpa.screen: QXcbConnection: Could not connect to display
Could not connect to any X display.

I don't understand how rstudio works. I do not want rstudio desktop to use X, just web. I want the desktop linux to start a web service and give me a URL to connect to. Do I have to install RStudio Server for http ?

Yes, if you want to use RStudio through a web browser, you have to use the server version.