Rstudio desktop crashes upon startup after upgrading to Kubuntu 21.10

Hello, I just upgraded to Kubuntu 21.10 (impish) beta, which seems like it went fine. But RStudio desktop (running latest version) no longer works. The window comes up and it's just blank. There are no panes visible.

Any ideas about what I should do?

similar problems, see: Rstudio does not start in Ubuntu 21.10