Loading required package: shiny
Loading required package: methods

Listening on http://127.0.0.1:8765
Warning: Error in baduicall: ui boom
Stack trace (innermost first):
    51: baduicall [${PWD}/stacktrace6/ui.R#5]
    50: tag
    49: tags$div
    48: div
    47: wellPanel [${SHINY}/R/bootstrap.R#320]
    46: tag
    45: tags$div
    44: div
    43: tagList
    42: attachDependencies
    41: bootstrapPage [${SHINY}/R/bootstrap.R#56]
    40: fluidPage [${SHINY}/R/bootstrap-layout.R#72]
     1: shiny::runApp [${SHINY}/R/server.R#685]
Error in baduicall() : ui boom
NULL
