MxNet for R in Windows

To install MxNet for CPU only, I used in R console the following code

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

However it did not work, seems not finding the address above. Any suggestion?
Best,
Fernando