shinyAce creates a gray box

[EeethB]

I'm interested in embedding an Ace editor in my shiny app, but anything I run with shinyAce just creates a blank gray box that can't be edited.

Even the basic example:

# install.packages("shinyAce")
shiny::runApp(system.file("examples/01-basic", package="shinyAce"))

Gives me this:

Has anyone else had this problem?

Edit:

sessionInfo()
# R version 3.6.1 (2019-07-05)
# Platform: x86_64-w64-mingw32/x64 (64-bit)
# Running under: Windows >= 8 x64 (build 9200)

[EeethB]

UPDATE: For some reason, running it through my browser instead of through the built-in RStudio browser worked:

shiny::runApp(system.file("examples/01-basic", package="shinyAce"), launch.browser = TRUE)