The same here.
System: openSuSE 15.3 and OpenSuSE Tumbleweed an a Dell XPS9500, Nvidia graphics card disabled.
Rstudio: latest version
R version: 4.1.1
Steps taken: Reinstalled R-studio, resetted Rstudio according to the support articles, set rendering to software in the ini, did a diagnostics run, nothing unusual, Rstudio is able to connect to R.
Interestingly, rstudio starts when running as root user.