FTP transfert don’t work anymore

Hello all,

I have a website with BackWPup that send the archive via ftp. With Version 4.0.4 it worked perfectly until Version 4.1.0. Now with Version 4.1.0., FTP part doesn’t work anymore.

I have tested :

• Use explicit SSL-FTP connection checked and non checked
• Use FTP Passive Mode / non Use FTP Passive Mode
• changed the timeout
• transfert work with a php script.

Here the ftp part of the log.

[13-Jun-2024 10:34:06] 1. Try to send backup file to an FTP server …
[13-Jun-2024 10:34:07] Connected to FTP server: XXXXXXXX:21
[13-Jun-2024 10:34:07] FTP client command: USER XXXXXXXX
[13-Jun-2024 10:34:07] FTP server response: User XXXXXXXX logged in.
[13-Jun-2024 10:34:07] FTP client command: SYST
[13-Jun-2024 10:34:07] FTP server reply: UNIX
[13-Jun-2024 10:34:07] FTP current folder is: /XXXXXXXX/
[13-Jun-2024 10:34:07] FTP client command: PASV
[13-Jun-2024 10:34:07] FTP server reply: Entering normal mode
[13-Jun-2024 10:34:07] Starting upload to FTP  …
[13-Jun-2024 10:34:07] WARNING: ftp_nb_fput(): Can't build data connection: No route to host.
[13-Jun-2024 10:34:07] ERROR: Cannot transfer backup to FTP server!

Can some one face the same problem or can help ?

Thank you in advance,

RF