Shiny file.path error

I've run into a problem with a fresh shiny install. Launching an app opens a browser window and returns an error from file.path. No information is in the logs and there is no traceback to show what caller is causing the problem.

library(shiny)
runExample('01_hello')

Listening on http://127.0.0.1:7009
Warning: Error in file.path: cannot coerce type 'closure' to vector of type 'character'
[No stack trace available]

The server is a RHEL 8.2 box with Shiny 1.4.0.2 and the error appears with both R 4.0.1 and R 3.6.3.

My guess is that something on the system is misconfigured but I can't figure out what with so little information returned.

Any thoughts?


Perhaps until fixes are merged avoid showcase mode?

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