I can't attach any R session to VS Code when using a remote server via SSH and it can't find the binary either.

I am using a conda virtual environment for a research project conducted at a remote server which I access via SSH.

I use the [Remote SSH] (https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-ssh) extension to connect to the host and then I need to edit R files there. The code below shows that both R and radian are correctly set, I believe:

(r_conda) [rgr6291@klc0201 bin]$ conda env list
# conda environments:
#
fomc                     /home/rgr6291/.conda/envs/fomc
r_conda               *  /home/rgr6291/.conda/envs/r_conda
rfe_paper                /home/rgr6291/.conda/envs/rfe_paper
base                     /software/python-anaconda3/2019.10

(r_conda) [rgr6291@klc0201 bin]$ which R
~/.conda/envs/r_conda/bin/R
(r_conda) [rgr6291@klc0201 bin]$ which radian
~/.conda/envs/r_conda/bin/radian

In the settings for the R extension, I have set these binaries as the RPath and the Rterm:

{
    "r.rpath.linux": "~/.conda/envs/r_conda/bin/R",
    "r.rterm.linux": "~/.conda/envs/r_conda/bin/radian"
}

However, I get errors like this one when I try to attach an R session:

Cannot find R client at ~/.conda/envs/r_conda/bin/radian. Please check r.rterm setting.

And also it complains that it can't find the jsonlite package although it has been installed:

Failed to get list of R functions. Make sure that jsonlite is installed and r.rpath.linux points to a valid R executable.

What am I missing here?

Start by reproducing the attach flow through Remote SSH with the conda paths configured in r.rpath.linux and r.rterm.linux. Check how the extension discovers R and radian in that environment, then verify the jsonlite lookup; done means an R session attaches remotely and the extension can find the executable and package.