Error in readRDS(file)

I cannot seem to be able to install any package in Rstudio. Every time I try to run a code, this error appears "Error in readRDS(file): unknown input format". Can you please help me?

Hi, and welcome!

Please see the FAQ: What's a reproducible example (`reprex`) and how do I do one? For future reference using a reprex, complete with representative data will attract quicker and more answers.

Here, we need some clarification.

readRDS is akin to unzipping a file; it's not used to install libraries or run code. Its general purpose is to save an object after it has been constructed, so it doesn't have to be re-run every time.

In the Console pane, does the code

2 + 6
#> [1] 8

Created on 2020-03-12 by the reprex package (v0.3.0)

If so, the way to install packages is


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