Exporting photos?

I found an old post about using Script Editor to export smart albums from the photos app into a new folder, but keep getting an error message: permission denied. Can someone tell me exactly what changes I need to make to this script for it to work for me?

This is the script I found that seemed to work for people:

set dest to "/Users/me/Desktop/photos-Albums/" as POSIX file as text -- the destination folder (use a valid path)

tell application "Photos"

repeat with i in albums

set tFolder to dest & (get name of i)

my makeFolder(tFolder) -- create a folder named (the name of this album) in dest

export (get media items of i) to (tFolder as alias) without using originals

end repeat

end tell

on makeFolder(tPath)

do shell script "mkdir -p " & quoted form of POSIX path of tPath

end makeFolder