Problem in installing packages in latest version of R

[Ghulam]

Hi, everyone. I am new to the community and also to R. i was using R 3.6.3 with R studio (2022.02.1 Build 461). last week i updated R gui to 4.2. unfortunately, i uninstalled the previous version(3.6.3) now all packages are gone. now i can't install any of them. R gives me the following message. do i have to reinstall the previous version?

Warning in install.packages :
unable to access index for repository https://cran.rstudio.com/src/contrib:
cannot open URL 'https://cran.rstudio.com/src/contrib/PACKAGES'
Installing package into ‘C:/Users/HP/AppData/Local/R/win-library/4.2’
(as ‘lib’ is unspecified)

Warning in install.packages :
package ‘metan’ is not available for this version of R

[andresrcs]

@Ghulam

unable to access index for repository https://cran.rstudio.com/src/contrib:
cannot open URL 'https://cran.rstudio.com/src/contrib/PACKAGES

This seems like a connectivity issue, R is not being able to connect to the CRAN repository you have selected, these are some things to try.

• Choose a different CRAN repository, RStudios repository is a good choice (http://cran.rstudio.com/) or you could choose one that is geographically closer to you.
  
  
• Disable secure download setting.
  
  
• Check if your internet connection has traffic restrictions of some kind, like a firewall, proxy server, etc. This is usually the case when you are at work or school.