Hi.
Same here from a Kubuntu 21.10 and last build of Rstudio community edition.
The app is launched and loads the menu bar... and nothing more. It requires an explicit kill to close everything.
It's pretty frustrating because I didn't found any clue either. No crash message. Didn't find any log. Running from terminal doesn't show any output either.
I was quite surprised by @gsgmx info, that it worked with roots privileges. I tried. It does indeed. Weird. Nevertheless it's not something I'd like to do.
From other apps I'm running and that recently and suddenly crashed, I got a hint and found something that might help, while waiting for a more professional answer from someone...