R 3.5 shiny xtable error while deployment

[jcblum]

Something similar was being discussed over here:

Error deploying to shinyapps.io

shinyapps.io is a Linux environment based on Ubuntu Trusty, as such, support for R 3.5.0 will not be available until the R binaries for Ubuntu Trusty become available, regardless of your local environment having R 3.5.0 due to your running macOS or Windows.

You may want to downgrade back to R 3.4.4 until you can confirm that shinyapps.io has successfully made the switch to R 3.5.0.