Job has started, but not responded for 10 seconds

Hi there,
i keep getting this error message: Job has started, but not responded for 10 seconds
Can you help me please?
I don’t know, what to do. I updated the plugin on latest version, deleted all old backups on the server – always the same message.

Here is the debug info:

WordPress-Version: 5.7.2
BackWPup-Version: 3.9.0
PHP-Version: 8.0.3-he.1  (64bit)
MySQL-Version: 8.0.22-13
cURL-Version: 7.64.0
cURL-SSL-Version: OpenSSL/1.1.1d
WP-Cron-URL: https://your-local-hero.com/wp-cron.php
Server-Selbstverbindung: Response-Test OK.
Document root: /is/htdocs/wp11043846_O63MD7A5YD/yourlocalhero/wordpress/
Temp-Verzeichnis: /is/htdocs/wp11043846_O63MD7A5YD/yourlocalhero/wordpress/wp-content/uploads/backwpup-3781f9-temp/
Protokoll-Verzeichnis: /is/htdocs/wp11043846_O63MD7A5YD/yourlocalhero/wordpress/wp-content/uploads/backwpup-3781f9-logs/
Server: Apache
Betriebssystem: Linux
PHP-SAPI: apache2handler
Aktueller PHP-User: 
Maximale Skript-Laufzeit: 30 Sekunden
BackWPup Maximale Script-Ausführungszeit: 30 Sekunden
Alternative WP Cron: Aus
WP Cron abgeschaltet: Aus
Verzeichnis-Rechte: 493
Server-Zeit: 13:38
Zeit der Website: 15:38
Zeitzone der Website: Europe/Berlin
Zeitverschiebung der Website: 2 Stunden
Sprache der Website: de-DE
Zeichensatz des MySQL-Clients: utf8
PHP-Memory-Limit: 256M
WordPress-Memory-Limit: 256M
Maximales WordPress-Memory-Limit: 256M
Benutzter Speicher: 194,00 MB
Deaktivierte PHP-Funktionen:: syslog
Geladene PHP-Erweiterungen:: Core, PDFlib, PDO, Phar, Reflection, SPL, SimpleXML, apache2handler, bcmath, bz2, calendar, ctype, curl, date, dba, dom, exif, fileinfo, filter, ftp, gd, gettext, hash, iconv, imap, intl, json, ldap, libxml, mbstring, mysqli, mysqlnd, openssl, pcre, pdo_mysql, pdo_sqlite, posix, pspell, session, shmop, soap, sockets, sqlite3, standard, sysvmsg, sysvsem, sysvshm, tidy, timezonedb, tokenizer, xml, xmlreader, xmlwriter, xsl, zip, zlib

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