TYPO3 13.4.19
fal_securedownload 6.0.2
Due to this line non-admin backend users are not allowed to view files from the filelist without having set the permissions in the user.tsconfig.
When inserting this in the user.tsconfig it is working:
permissions {
file {
storage {
1 {
readFile = 1
}
}
}
}
This is not needed by default, so please check again how the core handles this.