Backup error

[STEP] [2021-02-17 20:08:26] Initializing backup…
[INFO] [2021-02-17 20:08:26] Backup & Migration version: 1.0.9
[INFO] [2021-02-17 20:08:26] Site which will be backed up: http://natuerlich-begreifen.de
[INFO] [2021-02-17 20:08:26] PHP Version: 7.4.15
[INFO] [2021-02-17 20:08:26] Web server: Apache
[INFO] [2021-02-17 20:08:26] Max execution time (in seconds): 259200
[INFO] [2021-02-17 20:08:26] Checking if backup dir is writable…
[INFO] [2021-02-17 20:08:26] Initializing custom error handler
[SUCCESS] [2021-02-17 20:08:26] Yup it is writable…
[INFO] [2021-02-17 20:08:26] PHP CLI is available – plugin will try to run server script.
[STEP] [2021-02-17 20:08:26] Scanning files…
[STEP] [2021-02-17 20:08:26] Checking free space, reserving…
[INFO] [2021-02-17 20:08:26] Requires at least 179864989 bytes. [171.53 MB]
[INFO] [2021-02-17 20:08:26] Disk free space function is not disabled – using…
[INFO] [2021-02-17 20:08:26] Checking this path/partition: /homepages/27/d817339803/htdocs/clickandbuilds/natuerlichbegreifen/wp-content/backup-migration/backups
[SUCCESS] [2021-02-17 20:08:26] There is 839,648.07 MB free. [819.97 GB]
[SUCCESS] [2021-02-17 20:08:26] Great! We have enough space.
[SUCCESS] [2021-02-17 20:08:26] Confirmed, there is more than enough space, checked: 179864989 bytes
[INFO] [2021-02-17 20:08:26] Scanning done – found 3285 files…
[SUCCESS] [2021-02-17 20:08:26] Backup initialized…
[STEP] [2021-02-17 20:08:26] Initializing archiving system…
[SUCCESS] [2021-02-17 20:08:26] Archive system initialized…
[STEP] [2021-02-17 20:08:26] Preparing map of files…
[SUCCESS] [2021-02-17 20:08:26] Files prepared.
[INFO] [2021-02-17 20:08:26] Starting compression process…
[STEP] [2021-02-17 20:08:26] Smart memory calculation…
[INFO] [2021-02-17 20:08:26] There is 384 MBs of memory to use
[INFO] [2021-02-17 20:08:26] WordPress memory limit: 256 MBs
[SUCCESS] [2021-02-17 20:08:26] Setting the safe limit to 86 MB
[STEP] [2021-02-17 20:08:26] Making database backup
[INFO] [2021-02-17 20:08:26] Iterating database…
[INFO] [2021-02-17 20:08:27] Database size: 6.28 MB
[SUCCESS] [2021-02-17 20:08:27] Database backup finished
[STEP] [2021-02-17 20:08:27] Making archive
[INFO] [2021-02-17 20:08:27] Compressing…
[INFO] [2021-02-17 20:08:27] Using PclZip module to create the backup
[INFO] [2021-02-17 20:08:27] Legacy setting: Using default modules depending on user server
[STEP] [2021-02-17 20:08:27] Running PHP CLI process – it should be confirmed with next messages
[WARN] [2021-02-17 20:08:29] Could not find any response from the server, trying again in 3 seconds.
[WARN] [2021-02-17 20:08:32] Still nothing backup probably is not running.
[STEP] [2021-02-17 20:08:32] Reverting backup, removing file…
[ERROR] [2021-02-17 20:08:32] There was an error during backup…
[ERROR] [2021-02-17 20:08:32] Backup could not run on your server, please check global logs.
[STEP] [2021-02-17 20:08:32] Aborting backup…
[DOWNLOAD GENERATED] File downloaded on (server time): 2021-02-17 20:08:34
[DOWNLOAD GENERATED] Last update (seconds): 8 seconds ago
[DOWNLOAD GENERATED] Last update (date): 2021-02-17 20:08:26