r - rstudio/shinyapps - Error in set(new) : cannot change working directory -

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i removed shinyapps , tried install again, error.

remove.packages("shinyapps", "c:/users/xxx/documents/r/win-library/3.1")

to install back,

> devtools::install_github('rstudio/shinyapps') downloading github repo rstudio/shinyapps@master installing shinyapps error in set(new) : cannot change working directory

any ideas?


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