RasterBrick Error

Hello

I have taken over a shiny app project from a colleague. Apparently, before they left, it was working and now I cannot get it to run. I am just working my way through learning how to use raster data in R.

When I run the script it get the following error:

"Error in .rasterObjectFromFile(x, objecttype = "RasterBrick", ...): Cannot create a RasterLayer object from this file. (file does not exist)

I do not know where to start in trying to diagnose this problem. Any help our paths to follow would be greatly appreciated.

Try to determine what raster file the code wants to load, then search your filesystem to find it if its there