Found an answer to this in Scott's post here: https://forum.posit.co/t/shiny-app-fails-for-deploy-after-updating-all-packages-the-url-is-scottkbrown-shinyapps-io-gcstats/28842
The application has been deployed, but now the application has failed to start with the following message:
── Attaching packages ─────────────────────────────────────── tidyverse 1.2.1 ──
✔ ggplot2 3.1.1 ✔ purrr 0.3.2
✔ tibble 2.1.1 ✔ dplyr 0.8.0.1
✔ tidyr 0.8.3 ✔ stringr 1.4.0
✔ readr 1.3.1 ✔ forcats 0.4.0
── Conflicts ────────────────────────────────────────── tidyverse_conflicts() ──
✖ dplyr::filter() masks stats::filter()
✖ dplyr::lag() masks stats::lag()
Attaching package: ‘DT’
The following objects are masked from ‘package:shiny’:
dataTableOutput, renderDataTable
Error in value[[3L]](cond) : trying to use CRAN without setting a mirror
Calls: local ... tryCatch -> tryCatchList -> tryCatchOne -> <Anonymous>
Execution halted