LibreOffice-Base crashes in the formular assistent.

[Lutz Herrmann]

When I start the formular assistent in LibreOffice-base, the window don't close and ther is no formular. In The screenshot I started LibreOffice in the shell. Ther you can see some java errors.
The same problem is in Ubuntu 18.04 with LibreOffice 6.4.x.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: libreoffice-core 1:6.4.2-0ubuntu3
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon Apr 27 06:53:12 2020
ExecutablePath: /usr/lib/libreoffice/program/soffice.bin
InstallationDate: Installed on 2020-04-06 (20 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
ProcEnviron:
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
 LD_LIBRARY_PATH=<set>
SourcePackage: libreoffice
UpgradeStatus: No upgrade log present (probably fresh install)