I was having some difficulties converting OVA images yesterday. At first, I thought it may have been a compatibility issue with VirtualBox 7.0.  However, when I went to run libguestfs-test-tool, it began failing with the exact same error as the conversions, which leads me to believe the issue may lie with libguestfs and not the images themselves. 

To test further, I created a fresh install of Ubuntu 22.04, and the libguestfs-test-tool seems to fail with the same error, even on a fresh install.  I am attaching the libguestfs-test-tool output for reference.  

Ubuntu 22.04 is running libguestfs-tools 1.46.2-10ubuntu3 

If anybody has any insight into the issue, or if you feel a bug report needs to be filed, please let me know.

Sincerely,

Justin Churchey