Hi Andresrcs,
Please find the error message which I got from Rstudio,
install.packages('prophet',repos = "https://CRAN.R-project.org/package=prophet")
Installing package into ‘Documents/R/win-library/3.5’
(as ‘lib’ is unspecified)
Warning in install.packages :
unable to access index for repository https://CRAN.R-project.org/package=prophet/src/contrib:
cannot open URL 'https://CRAN.R-project.org/package=prophet/src/contrib/PACKAGES'
Warning in install.packages :
package ‘prophet’ is not available (for R version 3.5.1)
Warning in install.packages :
unable to access index for repository https://CRAN.R-project.org/package=prophet/bin/windows/contrib/3.5:
cannot open URL 'https://CRAN.R-project.org/package=prophet/bin/windows/contrib/3.5/PACKAGES'