Hi, is there anyone could explain why the workflowInstall is not working, I would like to install the TCGAWorkflow in RStudio, see below:

> source("http://bioconductor.org/workflows.R")
Bioconductor version 3.6 (BiocInstaller 1.28.0), ?biocLite for help
> workflowInstall("TCGAWorkflow")
Warning in install.packages :
  cannot open URL 'http://www.stats.ox.ac.uk/pub/RWin/src/contrib/PACKAGES.rds': HTTP status was '404 Not Found'
Installing package into D:/R_WorkSpace/library?(as 憀ib?is unspecified)
Warning in install.packages :
  package TCGAWorkflow?is not available (for R version 3.4.2)
Warning in install.packages :
  cannot open URL 'https://bioconductor.org/packages/3.6/data/annotation/bin/windows/contrib/3.4/PACKAGES.rds': HTTP status was '404 Not Found'
Warning in install.packages :
  cannot open URL 'https://bioconductor.org/packages/3.6/data/experiment/bin/windows/contrib/3.4/PACKAGES.rds': HTTP status was '404 Not Found'

Is it due to the version of bioconductor?

Thanks!