unable to publish my app on shinyapps.io

Hi and thanks for reading me
I am working with an app, which I have already uploaded to shinyapps several times without problems (updated versions), but the problem arose when I implemented functions from the "mapboxer" package since when uploading the app I started to get the error "error in value [[3L]] (cond) there is no package named 'mapboxer' ". The package is declared in the "global.R" file as "library(mapboxer)", and I even tried to declare the package in the ui.R and server.R files, but none of that worked. Has anyone had the same problem or know of some way to solve it? It should be noted that the "mapboxer" package is the latest version of CRAN

Thanks for the help