Hi,
this looks like an problem with Vivado and your OS.
XUbuntu is not supported by Vivado, see:
https://www.xilinx.com/support/documentation/sw_manuals/xilinx2020_2/ug973-vivado-release-notes-install-license.pdf• Microsoft Windows Professional/Enterprise 10.0 1809 Update; 10.0 1903 Update; 10.0 1909
Update; 10.0 2004 Update
• Red Hat Enterprise Workstation/Server 7.4 - 7.8, and 8.2 (64-bit), English/Japanese
• CentOS 7.4 - 7.8, and 8.2 (64-bit), English/Japanese
• SUSE Linux Enterprise 12.4 (64-bit), English/Japanese
• Amazon Linux 2 AL2 LTS (64-bit)
• Ubuntu Linux 16.04.5 LTS;16.04.6 LTS; 18.04.1 LTS; 18.04.2 LTS, 18.04.3 LTS; 18.04.4 LTS;
and 20.04 LTS (64-bit), English/Japanese
Maybe you try to generate it on VM with an supported OS.
br
John