Unable to install packages on R studio version 3.4.4

Clst · October 17, 2018, 10:33pm

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install.packages unable to access index for repository: Try disabling “secure download method for HTTP” General

Hello everyone, I recently found a topic on the problem related to the installation of packages from the cran repository. install.packages("devtools") 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/inspirion 14a2/Documents/R/win-library/3.4’ (as ‘lib’ is unspecified) 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' Warning in install.packages : package ‘devtools’ is not available (for R version 3.4.0) Warni…