PHP errors when creating a new web

When creating a new web with all default settings, you receive 3 PHP warnings:
31.01.2021-21:55 - DEBUG - Adding the user: web118
31.01.2021-21:55 - DEBUG - safe_exec cmd: chattr -i '/var/www/clients/ \client0/web118' - return code: 0
PHP Warning: Invalid argument supplied for foreach() in /usr/local/ispconfig/server/lib/classes/system.inc.php on line 2437
31.01.2021-21:56 - DEBUG - safe_exec cmd: jk_init -c /etc/jailkit/jk_init.ini -j \'/var/www/clients/client0/web118' 'basicshell' 'editors' 'extendedshell' 'netutils' 'ssh' 'sftp' 'scp' 'groups' 'jk_lsh' - return code: 0
31.01.2021-21:56 - DEBUG - Added jailkit chroot
PHP Warning: Invalid argument supplied for foreach() in /usr/local/ispconfig/server/lib/classes/system.inc.php on line 2520
31.01.2021-21:56 - DEBUG - safe_exec cmd: jk_cp -j '/var/www/clients/ \client0/web118' '/usr/bin/groups' '/usr/bin/id' '/usr/bin/dircolors' '/usr/bin/lesspipe' '/usr/bin/basename' '/usr/bin/dirname' '/usr/bin/nano' '/usr/bin/pico' '/usr/bin/mysql' '/usr/bin/mysqldump' '/usr/bin/git' '/usr/bin/git-receive-pack' '/usr/bin/git-upload-pack' '/usr/bin/unzip' '/usr/bin/zip' '/bin/tar' '/bin/rm' '/usr/bin/patch' - return code: 0
31.01.2021-21:56 - DEBUG - Added app programs to jailkit chroot
PHP Warning: Invalid argument supplied for foreach() in /usr/local/ispconfig/server/lib/classes/system.inc.php on line 2520
31.01.2021-21:56 - DEBUG - safe_exec cmd: jk_cp -j '/var/www/clients/ \client0/web118' '/usr/bin/php' '/usr/bin/perl' '/usr/share/perl' '/usr/share/php' - return code: 0
31.01.2021-21:56 - DEBUG - Added cron programs to jailkit chroot