I also cannot install RStudio Server 1.2.5042 doesn't install on my WSL Ubuntu 20.04; seems it is not compatible. But I get a different error:
/usr/lib/rstudio-server/bin/rserver: error while loading shared libraries: libssl.so.1.0.0: cannot open shared object file: No such file or directory
I have installed the latest version of libssl-dev and libssl1.0.0 is unavailable with the following error:
Package libssl1.0.0 is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source
It seems RStudio Server 1.3.947 is a professional version not available to the general public (or am I wrong? I can't find a download link, only a user manual that doesn't contain installation instructions for rstudio server itself). I use RStudio Server to run RStudio in my WSL (which doesn't have a GUI - so I run RStudio in my browser). Is there any other solution for me until Ubuntu 20.04 is supported? Thanks!