Cannot download packages for Knit

[Znie]

I tried to knit my file to pdf but I cannot download the required packages. Any advice woill be appreciated!

** Installing R Package Dependencies for R Markdown: 'Rcpp', 'base64enc', 'digest', 'evaluate', 'glue', 'highr', 'htmltools', 'jsonlite', 'knitr', 'magrittr', 'markdown', 'mime', 'rmarkdown', 'rprojroot', 'stringi', 'stringr', 'tinytex', 'xfun', 'yaml'

[1/21] Installing Rcpp...

Warning in utils::install.packages("Rcpp", repos = "https://cran.rstudio.com/") :
'lib = "C:/Program Files/R/R-4.0.2/library"' is not writable
Error in utils::install.packages("Rcpp", repos = "https://cran.rstudio.com/") :
unable to install packages
Calls: sourceWithProgress -> eval -> eval ->
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[andresrcs]

@Znie

lib = "C:/Program Files/R/R-4.0.2/library"' is not writable

You have to run Rstudio as administrator to be able to install on this folder