su: ignoring --preserve-environment, it's mutually exclusive with --login

Attaching package: ‘bs4Dash’

The following objects are masked from ‘package:shiny’:

    actionButton, column, insertTab, tabsetPanel

The following object is masked from ‘package:graphics’:

    box


Attaching package: ‘shinyWidgets’

The following object is masked from ‘package:bs4Dash’:

    progressBar


Attaching package: ‘DT’

The following objects are masked from ‘package:shiny’:

    dataTableOutput, renderDataTable


Attaching package: ‘CVXR’

The following object is masked from ‘package:stats’:

    power

Loading required package: survival
Warning in file(con, "r") :
  cannot open file 'www/intro.md': No such file or directory
Error in file(con, "r") : cannot open the connection
Calls: runApp ... includeMarkdown -> <Anonymous> -> <Anonymous> -> readLines -> file
Execution halted