backwpup doesn’t save new jobs

Hello,

I am trying to backup a staging website, however I’m having a problem. When I try to create a new job and save the settings backwpup resets and doesn’t allow me to save anything. When I attempt to run a job without changing the settings it tells me that The job “New Job” needs properly configured destinations to run!

I am pasting the debug log below. Just something to note: at first the server status was 401, but by following your suggestion in another topic I went to Settings -> Network and changed the Auth method to Basic. I then entered the username and password for the staging website which gave me the Response Test O.K. status below.

WordPress version: 4.9.4
BackWPup version: 3.4.4
PHP version: 5.5.9-1ubuntu4.14 (64bit)
MySQL version: 5.5.47-0ubuntu0.14.04.1
cURL version: 7.35.0
cURL SSL version: OpenSSL/1.0.1f
WP-Cron url: /wp-cron.php
Server self connect: Response Test O.K.
Document root: /var/www/sites/xxxx
Temp folder: /wp-content/uploads/backwpup-d79066-temp/
Log folder: /wp-content/uploads/backwpup-d79066-logs/
Server: Apache/2.4.7 (Ubuntu)
Operating System: Linux
PHP SAPI: apache2handler
Current PHP user: dev1
Maximum execution time: 300 seconds
Alternative WP Cron: Off
Disabled WP Cron: Off
CHMOD Dir: 509
Server Time: 9:15
Blog Time: 09:15
Blog Timezone:
Blog Time offset: 0 hours
Blog language: en-GB
MySQL Client encoding: utf8mb4
PHP Memory limit: 256M
WP memory limit: 64M
WP maximum memory limit: 256M
Memory in use: 57.50 MB
Disabled PHP Functions:: pcntl_alarm, pcntl_fork, pcntl_waitpid, pcntl_wait, pcntl_wifexited, pcntl_wifstopped, pcntl_wifsignaled, pcntl_wexitstatus, pcntl_wtermsig, pcntl_wstopsig, pcntl_signal, pcntl_signal_dispatch, pcntl_get_last_error, pcntl_strerror, pcntl_sigprocmask, pcntl_sigwaitinfo, pcntl_sigtimedwait, pcntl_exec, pcntl_getpriority, pcntl_setpriority,
Loaded PHP Extensions:: Core, PDO, Phar, Reflection, SPL, SimpleXML, Zend OPcache, apache2handler, bcmath, bz2, calendar, ctype, curl, date, dba, dom, ereg, exif, fileinfo, filter, ftp, gd, gettext, hash, iconv, json, libxml, mbstring, mcrypt, mhash, mysql, mysqli, openssl, pcre, pdo_mysql, posix, readline, session, shmop, soap, sockets, standard, sysvmsg, sysvsem, sysvshm, tokenizer, wddx, xml, xmlreader, xmlwriter, zip, zlib