Keep having error: Error in nchar(homeDir) : invalid multibyte string, element 1

Hi! I am a new user of R, and I have been having the same problem while installing packages.

I am trying to install the following package:


Then have this Error:

WARNING: Rtools is required to build R packages but is not currently installed. Please download and install the appropriate version of Rtools before proceeding:
Installing package into ‘C:/Users/roman/AppData/Local/R/win-library/4.2’
(as ‘lib’ is unspecified)
trying URL ''
Content type 'application/zip' length 422901 bytes (412 KB)
downloaded 412 KB

package ‘devtools’ successfully unpacked and MD5 sums checked

The downloaded binary packages are in
Error in nchar(homeDir) : invalid multibyte string, element 1

The last line keeps appearing with everything I want to install. I tried re-instaling everything, but the problem persists.
I am using Windows 11. My R Version is 4.2.1 and my Rstudio version is RStudio Desktop 2022.02.3+492
My lib.path is :

[1] "C:/Users/roman/AppData/Local/R/win-library/4.2" "C:/Program Files/R/R-4.2.1/library"

So it is not a problem with non-ASCII character is in my home directory path, as this post suggests: Hello there. I'm having a error message that I can't understand.

I will appreciate any help. Thank you very much

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