mate-appearance-properties crashed with SIGSEGV in g_main_context_dispatch()

Testing with Mate Tweak layouts, error happened. Ubuntu Mate 18.04 beta 1 under Virtualbox.

ProblemType: Crash
DistroRelease: Ubuntu 18.04
Package: mate-control-center 1.20.0-1ubuntu0
ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7
Uname: Linux 4.15.0-12-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CurrentDesktop: MATE
Date: Mon Mar 19 10:13:27 2018
ExecutablePath: /usr/bin/mate-appearance-properties
InstallationDate: Installed on 2018-03-19 (0 days ago)
InstallationMedia: Ubuntu-MATE 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180307.1)
ProcCmdline: mate-appearance-properties --show-page=background
ProcEnviron:
 LANGUAGE=es_CO:es
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=es_CO.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7feecaf8aaff: mov 0x18(%rax),%rdi
 PC (0x7feecaf8aaff) ok
 source "0x18(%rax)" (0x00000018) not located in a known VMA region (needed readable region)!
 destination "%rdi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: mate-control-center
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: mate-appearance-properties crashed with SIGSEGV in g_main_context_dispatch()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo