Mxnet R installation for Cpu not working

I’m trying to install mxnet in Rstudio but there’s an error. Who can help me please?

“cran <- getOption(“repos”)
cran[“dmlc”] <- “https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/
options(repos = cran)
install.packages(“mxnet”)”

Warning in install.packages :
unable to access index for repository https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/bin/windows/contrib/4.0:

download of package ‘mxnet’ failed