Error 404 on files linked in a page with file manager

Apr 21 at 4:21 PM
I've just upgraded to the latest version
In some pages there are links to files (that I uploaded by File Manager), When I click on such links to download the file I got "Error 404".
The same happens if I create e new page and I upload a new file in it.

This test page shows what I'm saying:

Such files are stored in AppData/files directory and all permissions are correctly set to that directory.

How can I fix such an issue?
Apr 26 at 4:57 PM
Hi Ugo,

I uploaded a spreadsheet to a new page on my own blog and was able to download from the page without any problems.

Have you tried using a file with a standard extension? I'm wondering if you have a problem because the .APDU extension is not a recognized?