library function returns NULL for all packages

Error Information:

when starting RStudio, no packages can be loaded via library(). library calls in .Rprofile work, but nothing interactively.

Steps taken so far - doing install.packages("Rcpp") allows library to work normally. But restarting Rstudio still has library not working until Rcpp is installed. How to not do this every time?

System Information:

  • RStudio Edition: Desktop
  • RStudio Version: 1.2.1335
  • OS Version: Windows 10 (1809)
  • R Version: 3.6.1

Issue seems to be a conflict with package:conflicted

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