shiny app deployment error.

[Brian Mwangi]

Iam deploying my shiny app to shinyapps.io & all my app files(app.r,www) are all stored in my dropbox. I have loaded the rsconnect command then published the app to my account. The deployment process is successful but when I go to my app url I get the following error:

Attaching package: ‘DT’

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

    dataTableOutput, renderDataTable


Attaching package: ‘shinydashboard’

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

    box

Loading required package: sp
rgdal: version: 1.3-4, (SVN revision 766)
 Geospatial Data Abstraction Library extensions to R successfully loaded
 Loaded GDAL runtime: GDAL 2.1.3, released 2017/20/01
 Path to GDAL shared files: /usr/share/gdal/2.1
 GDAL binary built with GEOS: TRUE
 Loaded PROJ.4 runtime: Rel. 4.9.2, 08 September 2015, [PJ_VERSION: 492]
 Path to PROJ.4 shared files: (autodetected)
 Linking to sp version: 1.3-1

Attaching package: ‘rsconnect’

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

    serverInfo

Error in value[[3L]](cond) : Cannot open data source
Calls: local ... tryCatch -> tryCatchList -> tryCatchOne -> <Anonymous>
Execution halted