Trying to add new user with users-admin, the newly created user doesn't exist after restarting the app.

then the output of when trying to change own name.

begin::Start of work report.
file_locate_tool_success::Found tool [uname].
file_run_pipe_success::Piping command [LC_ALL=C PATH=$PATH:/sbin:/usr/sbin /bin/uname -s 2> /dev/null |] for reading.
file_locate_tool_success::Found tool [usermod].
file_locate_tool_success::Found tool [userdel].
file_locate_tool_success::Found tool [useradd].
file_locate_tool_success::Found tool [adduser].
file_locate_tool_success::Found tool [deluser].
file_locate_tool_success::Found tool [chfn].
file_locate_tool_failed::Couldn't find tool [pw].
file_open_read_success::Reading options from [/etc/pam.d/passwd].
file_open_read_success::Reading options from [/etc/pam.d/common-password].
file_open_read_success::Reading options from [/etc/login.defs].
file_open_read_success::Reading options from [/etc/passwd].
file_open_read_success::Reading options from [/etc/shadow].
file_open_read_success::Reading options from [/etc/shells].
file_create_path::Directory [//var/cache/system-tools-backends/backup///1/] created.
file_backup_rotate::Backup directory [//var/cache/system-tools-backends/backup//] was rotated.
file_create_path::Directory [//var/cache/system-tools-backends/backup///1//etc/master.passwd] created.
file_backup_success::Saved backup for [//var/cache/system-tools-backends/backup//].
file_open_read_success::Reading options from [/etc/passwd].
file_open_read_success::Reading options from [/etc/shadow].
file_run::Running command [LC_ALL=C PATH=$PATH:/sbin:/usr/sbin /usr/sbin/usermod -d '/home/tta' -g '1000' -l 'tta' -p '$6$IaecseZ9$uS3fwauD1ULN0S.23buiaUhH9SIP.XbR1afdUfbXoEUkHzeJOHRbPCyTiz1jzMJcGO7M7vscUjFHGg7KP9atZ1' -s '/bin/bash' -u '1000' 'tta' 2> /dev/null > /dev/null].
file_run::Running command [LC_ALL=C PATH=$PATH:/sbin:/usr/sbin /usr/sbin/usermod -c 'Tuomas Aavikko,,,,' tta 2> /dev/null > /dev/null].
file_buffer_load::Loading file [/etc/shells] to buffer.
file_open_read_success::Reading options from [/etc/shells].
file_buffer_save::Saving buffer to file [/etc/shells].
file_open_write_success::Writing to [/etc/shells].
file_create_path::Directory [/etc/shells] created.
replace_split::Replacing key [UID_MIN] in [/etc/login.defs].
file_buffer_load::Loading file [/etc/login.defs] to buffer.
file_open_read_success::Reading options from [/etc/login.defs].
file_buffer_save::Saving buffer to file [/etc/login.defs].
file_open_write_success::Writing to [/etc/login.defs].
file_create_path::Directory [/etc/login.defs] created.
replace_split::Replacing key [UID_MAX] in [/etc/login.defs].
file_buffer_load::Loading file [/etc/login.defs] to buffer.
file_open_read_success::Reading options from [/etc/login.defs].
file_buffer_save::Saving buffer to file [/etc/login.defs].
file_open_write_success::Writing to [/etc/login.defs].
file_create_path::Directory [/etc/login.defs] created.
file_open_read_success::Reading options from [/etc/pam.d/passwd].
file_open_read_success::Reading options from [/etc/pam.d/common-password].
file_open_read_success::Reading options from [/etc/login.defs].
file_open_read_success::Reading options from [/etc/passwd].
file_open_read_success::Reading options from [/etc/shadow].
file_open_read_success::Reading options from [/etc/shells].