Difficulty installing Rtools, still getting the warning to install Rtools

[uncertain_heisenberg]

I installed Rtools from https://cran.rstudio.com/bin/windows/Rtools/. I set up the path file and on running Sys.which("make") I am getting the path mentioned on the site but while I am trying to install package json lite using the command install.packages("jsonlite", type = "source") I am still getting the following warning:

[williaml]

Hi, if you restart do you still have that issue?

[uncertain_heisenberg]

yes, tried that multiple times

[andresrcs]

You have installed RTools40 but that version is too be used with R >= 4.0.0 and you are using an older version. You have to either update your R version or install a suitable version of RTools from here

https://cran.r-project.org/bin/windows/Rtools/history.html