Backup Error

Hello,
Since more than 4 week the backup does not arrive to the end. A message like this “WARNING: Job restarts due to inactivity for more than 5 minutes” tells me that the job didn’t worked, and in the email:
[INFO] BackWPup 3.2.5; A project of Inpsyde GmbH
[INFO] BackWPup job: Backup sito
[INFO] Logfile is: backwpup_log_8505ec_2016-02-29_21-10-29.html
[INFO] Backup file is: backwpup_8505ec_2016-02-29_21-10-29.zip
[29-Feb-2016 21:10:29] 1. Try to backup database …
[29-Feb-2016 21:10:29] Connected to database db82cd385_30143a on hostingmysql331.register.it
[29-Feb-2016 21:10:30] Added database dump “db82cd385_30143a.sql” with 1,83 MB to backup file list
[29-Feb-2016 21:10:30] Database backup done!
[29-Feb-2016 21:10:30] 1. Trying to make a list of folders to back up …
[29-Feb-2016 21:10:38] Added “wp-config.php” to backup file list
[29-Feb-2016 21:10:38] 614 folders to backup.
[29-Feb-2016 21:10:39] 1. Trying to generate a file with installed plugin names …
[29-Feb-2016 21:10:40] Added plugin list file “Pancotti-Superfici.pluginlist.2016-02-29.txt” with 1,51 kB to backup file list.
[29-Feb-2016 21:10:40] 1. Trying to generate a manifest file …
[29-Feb-2016 21:10:40] Added manifest.json file with 5,00 kB to backup file list.
[29-Feb-2016 21:10:40] 1. Trying to create backup archive …
[29-Feb-2016 21:10:40] Compressing files as ZipArchive. Please be patient, this may take a moment.
[29-Feb-2016 21:30:16] WARNING: Job restarts due to inactivity for more than 5 minutes.
[29-Feb-2016 21:30:17] 2. Trying to create backup archive …
[29-Feb-2016 21:37:21] WARNING: Job restarts due to inactivity for more than 5 minutes.
[29-Feb-2016 21:37:21] 2. Trying to create backup archive …
[29-Feb-2016 22:05:42] WARNING: Job restarts due to inactivity for more than 5 minutes.
[29-Feb-2016 22:05:42] 2. Trying to create backup archive …
[29-Feb-2016 22:21:14] WARNING: Job restarts due to inactivity for more than 5 minutes.
[29-Feb-2016 22:21:15] 2. Trying to create backup archive …
[29-Feb-2016 22:39:09] WARNING: Job restarts due to inactivity for more than 5 minutes.
[29-Feb-2016 22:39:09] 2. Trying to create backup archive …
[29-Feb-2016 23:04:31] WARNING: Job restarts due to inactivity for more than 5 minutes.
[29-Feb-2016 23:04:31] 2. Trying to create backup archive …
[29-Feb-2016 23:50:32] WARNING: Job restarts due to inactivity for more than 5 minutes.
[29-Feb-2016 23:50:32] 2. Trying to create backup archive …
[29-Feb-2016 23:59:40] WARNING: Job restarts due to inactivity for more than 5 minutes.
[29-Feb-2016 23:59:41] 2. Trying to create backup archive …
[01-Mar-2016 00:11:17] WARNING: Job restarts due to inactivity for more than 5 minutes.
[01-Mar-2016 00:11:17] 3. Trying to create backup archive …
[01-Mar-2016 00:37:03] WARNING: Job restarts due to inactivity for more than 5 minutes.
[01-Mar-2016 00:37:03] 3. Trying to create backup archive …
[01-Mar-2016 01:25:14] WARNING: Job restarts due to inactivity for more than 5 minutes.
[01-Mar-2016 01:25:15] 3. Trying to create backup archive …
[01-Mar-2016 01:50:42] WARNING: Job restarts due to inactivity for more than 5 minutes.
[01-Mar-2016 01:50:42] ERROR: Step aborted: too many attempts!
[01-Mar-2016 01:50:43] One backup file deleted
[01-Mar-2016 01:50:43] 1. Trying to check database …
[01-Mar-2016 01:50:44] Database check done!
[01-Mar-2016 01:50:44] One old log deleted
[01-Mar-2016 01:50:44] ERROR: Job has ended with errors in 16815 seconds. You must resolve the errors for correct execution.

How can I resolve it?
Thank you in advance

https://ww.wp.xz.cn/plugins/backwpup/