Error in running swirl package in R - r

I am not able to work in swirl package in R. I am able to install the swirl
package correctly. But while giving the library("swirl") command the error comes up.I have tried every thing like I am not able to find the answer of this error on internet. I have reinstalled R complete. I have tried changing directory. But still this error message is coming. Please help.This is the error message:
library("swirl")
Error in get(Info[i, 1], envir = env) :
cannot open file
'C:/Users/Devender/Documents/R/win-library/3.2/httr/R/httr.rdb': No such
file or directory
Error: package or namespace load failed for ‘swirl’
Thanks alot in advance

Try installing httr package. I think it will solve your problem.

You did not say which R version you are using.
Some Swirl packages are not available for few R versions as 3.2.2. You cant even download any courses from Github repositories into the Swirl if Swirl was successfully loaded in R.
You may want to re-install a different version of R to avoid this Swirl issue, and try again.

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Then I searched online to try to install the package "titletoc" separately, but I found nowhere to download this package. Something must be wrong, anyone has a clue?

Fail to load libraries after upgrading R to 3.6.0 on Mac

I needed to install the R package quadprog, which only works for R with version 3.6.0. So I installed R (3.6.0 version), and open it with RStudio. But now I failed to load any libraries, even after I installed the packages successfully using install.packages("package_name"). Specifically, the libraries I need to load are caret, forecast and ggplot2. I tried re-installing R but it still does not work. The error message I get is
Error: package or namespace load failed for ‘forecast’ in
dyn.load(file, DLLpath = DLLpath, ...): unable to load shared object
'/Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/libs/Rcpp.so':
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Please see below the images showing that the packages are stored in the same directory path of the R.
I read that you need to recompile your old packages after upgrading to newer version of R. Run the following line in your R terminal
update.packages(ask=FALSE,
checkBuilt=TRUE,
repos="https://cloud.r-project.org")
Then
install.packages(c("Rcpp", "caret", "forecast", "ggplot2", "quadprog"),
dependencies=TRUE,
repos="https://cloud.r-project.org")
Had similar issue, restart R session and install Rcpp from source
install.packages("Rcpp", type="source")
then load the library
library(Rcpp)
if still getting the error, restart R session and try loading library again.
I ended up by getting and then google searching the exact error code :). I fixed it by installing the latest version of R from CRAN along with the latest version of Rstudio. What I think happened was that when I updated some packages R and Rstudio were out of sync.

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