application failed to start - issue with shinyjs?



I am relatively new to R Shiny web apps, so hopefully this is not a too-simple question to answer. The app works locally, but when it was pushed to a, it produced the below error. The app I created has hoover text and renderUI drop down menus, so it uses the shinyjs and shinybs functions. The app was created on R version 3.4.1 (2017-06-30) -- "Single Candle", Version 1.0.153 - ? 2009-2017 RStudio, Inc. Anyone have any insight on why I am getting this error?

An error has occurred
The application failed to start (exited with code 1).

Attaching package: ‘shinyjs’

The following object is masked from ‘package:shiny’:


The following objects are masked from ‘package:methods’:

    removeClass, show

Error in value[[3L]](cond) : 
  shinyjs: In order to use the `extendShinyjs()` function, you must either use the `functions` argument, or install the `V8` package with `install.packages("V8")`.
Calls: local ... tryCatch -> tryCatchList -> tryCatchOne -> <Anonymous>
Execution halted


it seems to be a known issue
also described in the documentation of extendShinyjs