Hi Nikolai Shcherbin,
Thank you for your answer... but for example via a link with no Latin character i have the same problem: https://www.silencecommunity.com/file/view/428/modifiez-votre-profil no "downloading function".

I see this now.

The timestamps of files has changed after a migration to a new server.

Try this:

• Disable all caching settings on your site via /admin/settings/advanced
• As Elgg docs suggested:

You also need to delete the views cache on the test server after the copy process. This is a directory called views_simplecache in your data directory and the directory called system_cache .

• Run 'Flush the caches' via Administration
• Check your problem URLs again.
• Enable the caching on the site.

Read this also.

Thank you very much Nikolai Shcherbin ater this SQL query it works! Wonderful! :-) Thanks so much for your help.

Change the filestore data directory

UPDATE elgg_metastrings SET string = '/var/data/elgg_test/'
WHERE id = (
   SELECT value_id
   FROM elgg_metadata
   WHERE name_id = (
      SELECT *
      FROM (
         SELECT id
         FROM elgg_metastrings
         WHERE string = 'filestore::dir_root'
      ) as ms2
   )
   LIMIT 1
);