[R] Rstudio does not run on ubuntu 20

[Luigi Marongiu]

Hello,
all of a sudden rstudio stopped working on ubuntu 20.04. I
re-installed from `rstudio-1.3.959-amd64.deb` but it does not launch
even if there is an icon. On terminal I got:
```
$ rstudio
rstudio: error while loading shared libraries: libssl.so.1.0.0: cannot
open shared object file: No such file or directory
$ sudo apt-get install libssl1.0.0 libssl-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
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

E: Package 'libssl1.0.0' has no installation candidate

```
On internet, it is said that this library was discontinued
(https://askubuntu.com/questions/897444/libssl-so-1-0-0-is-missing)
R is up and running instead:
```
$ R
R version 4.0.1 (2020-06-06) -- "See Things Now"
Copyright (C) 2020 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

```
How can I launch studio then?
-- 
Best regards,
Luigi