无法将软件包 tm 安装到 Rstudio 中

问：

我正在运行 Rstudio 2022.12.0、R 4.2.3。

当我尝试安装“tm”时，我得到了以下内容：

 > install.packages("tm")
Warning in install.packages :
  unable to access index for repository https://cran.case.edu/src/contrib:
  cannot open URL 'https://cran.case.edu/src/contrib/PACKAGES'
Installing package into ‘C:/Users/kgreen/AppData/Local/R/win-library/4.2’
(as ‘lib’ is unspecified)
Warning in install.packages :
  unable to access index for repository https://cran.case.edu/src/contrib:
  cannot open URL 'https://cran.case.edu/src/contrib/PACKAGES'
Warning in install.packages :
  package ‘tm’ is not available for this version of R

A version of this package for your version of R might be available elsewhere,
see the ideas at
https://cran.r-project.org/doc/manuals/r-patched/R-admin.html#Installing-packages
Warning in install.packages :
  unable to access index for repository https://cran.case.edu/bin/windows/contrib/4.2:
  cannot open URL 'https://cran.case.edu/bin/windows/contrib/4.2/PACKAGES'

所以我下载了 Rtools 4.2.3 并运行安装程序（在 Rstudio 之外）。 然后我重新启动了 RStudio 并再次尝试，但它仍然看不到 Rtools。 我看到这个问题以前被问过，但答案不合适......关于设置安装时不存在的 bin 目录 （c：\rtools43\bin） 的路径。

我错过了什么？

我注意到文件：C：\rtools42\mingw64\bin

为空。没有文件 C：\rtools42\bin

当我尝试版本时，情况确实如此