When I start MATE System Monitor, the program opens and closes immediately.
Does anyone else have the same problem?
Or maybe the problem is just in my local settings:

os: GhostBSD (MATE) on QEMU/KVM (GNU/Linux host)

:$ mate-system-monitor
(<unknown>:1564): Pango-WARNING **: 18:23:41.053: Invalid UTF-8 string passed to pango_layout_set_text()

(<unknown>:1564): Pango-WARNING **: 18:23:41.300: Invalid UTF-8 string passed to pango_layout_set_text()
dbus[1564]: arguments to dbus_message_iter_append_basic() were incorrect, assertion "_dbus_check_is_valid_utf8 (*string_p)" failed in file dbus-message.c line 2760.
This is normally a bug in some application using the D-Bus library.

D-Bus not built with -rdynamic so unable to print a backtrace
LibGTop-Server(c=1565): [WARNING] pid 1565 received eof.
Abort trap (core dumped)

:$ locale
LANG=C.UTF-8
LC_CTYPE="C.UTF-8"
LC_COLLATE="C.UTF-8"
LC_TIME="C.UTF-8"
LC_NUMERIC="C.UTF-8"
LC_MONETARY="C.UTF-8"
LC_MESSAGES="C.UTF-8"
LC_ALL=

:$ ghostbsd-version -vfko
22.03.05
13.0-STABLE
1300525
22.02.19

There are some issues with my settings on QEMU/KVM.

The processor tag on the system tab is the first issue:
Intel Core i7 9xx (Nehalem Core i7, IBRS update)\Uffffffff\Uffffffff × 2
(The character with Unicode value \Uffffffff)

The second issue is described on the FreeBSD forum:
https://forums.freebsd.org/threads/mate ... elf.50334/

I found a temporary solution until I moved everything to VirtualBox next month.

Interestingly, OpenIndiana(MATE) and UbuntuMATE VM on the same system have no problems with MATE System Monitor.

Today I installed FreeBSD with a MATE desktop and it also has the same issues.

The problem can be marked as solved.