Issue with shiny deployApp

Hello,

I am trying to deply my shiny app to shiny io system. Somehow it is not possible. Well, actually it is but when I do it, the plots, images and maps are never shown. I am guessing that's because a encoding problem. Everytime I read a file I ensure to add encoding = 'UTF-8' (the files are in Spanish and I am working with Windows).

The erro looks like this:

Error in fread: File 'C:/Users/Practica' does not exist or is non-readable.

Warning in normalizePath(path.expand(path), winslash, mustWork) :
path[1]="C:/Users/fs/Visualizacion/www/ARGANZUELA.gif": El sistema no puede encontrar la ruta especificada
Warning in normalizePath(path.expand(path), winslash, mustWork) :

OGR data source with driver: GeoJSON
Source: "C:\workingdirectory\Distritos_de_Madrid.geojson", layer: "Distritos_de_Madrid"
with 21 features
It has 5 fields

Make sure you are not using absolute paths when referencing files on disk.