jobs not responding

Every time I start my backup job, I get the message “Job has started, but not responded for 10 seconds”. I tried reinstalling BackWPup, but that did not help. Debug info follows.

WordPress version: 5.2.1
BackWPup version: 3.6.9
PHP version: 7.2.19 (64bit)
MySQL version: 10.1.40-MariaDB-cll-lve
cURL version: 7.62.0
cURL SSL version: OpenSSL/1.0.2k
WP-Cron url: https://firesidepizza.com/wp-cron.php
Server self connect: Response Test O.K.
Document root: /home/fsb/public_html
Temp folder: /home/fsb/public_html/wp-content/uploads/backwpup-f9e240-temp/
Log folder: /home/fsb/public_html/wp-content/uploads/backwpup-f9e240-logs/
Server: LiteSpeed
Operating System: Linux
PHP SAPI: litespeed
Current PHP user: fsb
Maximum execution time: 30 seconds
BackWPup maximum script execution time: 30 seconds
Alternative WP Cron: Off
Disabled WP Cron: Off
CHMOD Dir: 0755
Server Time: 21:36
Blog Time: 14:36
Blog Timezone: America/Los_Angeles
Blog Time offset: -7 hours
Blog language: en-US
MySQL Client encoding: utf8mb4
PHP Memory limit: 256M
WP memory limit: 256M
WP maximum memory limit: 256M
Memory in use: 42.25 MB
Loaded PHP Extensions:: Core, PDO, Phar, Reflection, SPL, SimpleXML, bcmath, bz2, calendar, ctype, curl, date, dom, exif, fileinfo, filter, ftp, gd, gettext, gmp, hash, iconv, imap, ionCube Loader, json, libxml, litespeed, mbstring, mysqli, mysqlnd, openssl, pcntl, pcre, pdo_mysql, pdo_sqlite, posix, readline, session, shmop, soap, sockets, sqlite3, standard, timezonedb, tokenizer, wddx, xml, xmlreader, xmlwriter, xsl, zip, zlib

List of plugins installed:
Contact Form 7 v5.1.3
Disable Comments v1.9.0
Flamingo v2.0
Google Analytics for Dashboard for WP v 5.3.8
Litespeed Cache v2.9.8
Wordfence Security v7.3.3

I tried disabling Wordfence, but jobs would still not run.