Most of the times, when I try to open a help page in R studio, by hitting tab when start writing the name of a function and then do F1, the page doesn't open and throws the error: "There is no package...", although that package is installed and I load it with library("package"). For example, to open the help page for "resize()", after calling library(IRanges), it throws the error:

Error in find.package(if (is.null(package)) loadedNamespaces() else package,  : 
  there is no package called 'package:GenomicRanges'

Then I write:

library(GenomicRanges)

I try again and then new error shows up:

Error in find.package(if (is.null(package)) loadedNamespaces() else package,  : 
  there is no package called 'package:GenomicRanges'

Is it possible to solve this error?