Error in loading 'RcmdrMisc'

Hi there,
I am pretty new to use R and RStudio. I have a problem that RStudio can't run R correctly, can anyone tell me how to solve it, please?
I got an error just after install package"Rcmdr"
The code I saw is;

Error: package or namespace load failed for ‘RcmdrMisc’ in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]):
 there is no package called ‘proxy’

Just for your information;
I downloaded and installed
R-4.1.0-arm64.pkg
XQuarts (latest)
My PC is Mac Big Sur.
Thank you so much for your help in advance.
Sincerely,
Keita

You might need to install the package proxy.

install.packages("proxy")

Where can we find package proxy? It said;

> install.packages(proxy)
Error in install.packages : object 'proxy' not found
> 

Can anyone help me out?

You are missing the quotes around proxy

install.packages("proxy")