R语言中，下载软件包总是显示参数不对，我用的是3.6的RStadio，比如 install.pac

R语言中，下载软件包总是显示参数不对，我用的是3.6的RStadio，比如 install.packages("maps") Warning in install.packages : unable to access index for repository https://cran.rstudio.com/src/contrib: 'headers'参数不对 Warning in install.packages : unable to access index for repository https://cran.rstudio.com/src/contrib: 'headers'参数不对 Warning in install.packages : package ‘maps’ is not available (for R version 3.6.1) Warning in install.packages : unable to access index for repository https://cran.rstudio.com/bin/windows/contrib/3.6: 'headers'参数不对 请问各位这个需要怎么解决是什么问题