Hello, I have installed Rstudio on my Macbook Pro macOS Catalina.
Every time when I want to install any package this error pops up.
Warning in install.packages :
unable to access index for repository http://cran.rstudio.com/bin/macosx/el-capitan/contrib/3.6:
cannot open URL 'http://cran.rstudio.com/bin/macosx/el-capitan/contrib/3.6/PACKAGES'
I already tried to change CRAN etc. But nothing I found so far has not worked.
Does someone have an idea?