Use this article when the app cannot find, read, create, or change a local file, or when the folder option is missing.
Mac
Open Settings → Permissions and confirm that local file access is enabled.
Confirm that the required folder has been added.
Review Full Disk Access, the broadest macOS permission for this, if the app still cannot access the folder.
Windows
Confirm that the app is on its current update. Versions 26.8.1 and newer manage local file access in Settings → Permissions; older versions use the removed Settings → Sandbox and Settings → Devices pages, so update first.
Open Settings → Permissions and check the Local file system access row. It should show Enabled. If it shows Enable, select it and confirm the Windows permission; if it shows Update or Repair, select that.
Confirm that Desktop tools, the switch below the Local file system access row, is turned on.
Confirm that the required folder has been added with Choose folder in Computer mode.
Review the relevant Windows permission if the app still cannot access the folder.
If access worked before
Confirm that the file or folder has not been moved or renamed.
Remove and add the folder again.
Check whether the request needs a file outside the selected folder.
Restart the app.