Critical error occurred while running VM after Fedora 29 -> 31 upgrade

[dbhinz]

Had an older version of Fedora 29 running on VirtualBox 6.1.32. Used the upgrade instructions from this page to upgrade from Fedora 29 to 31, ​https://docs.fedoraproject.org/en-US/quick-docs/dnf-system-upgrade/. The plan was to upgrade from 29 -> 31 -> 33 -> 35.

Fedora 29 was running with no problems on VirtualBox 6.1.32. After using the upgrade instructions with no apparent errors and the upgrade verification was successful the VM tried to restart with the new installation of Fedora 31. At that point I got the "A critical error occurred while running the Virtual Machine." The log file and .png file are attached. There were no changes to the VirtualBox configuration, the Fedora upgrade process is automatic and after it completes it relaunches the new version.

Note that I tried upgrading to the 6.1.33 build and got the exact same problem, the attached logs are from the 6.1.32 and 6.1.33.

[dbhinz]

VBox.log for 6.1.32

[dbhinz]

VBox.png for 6.1.32

[dbhinz]

VBox.log for 6.1.33

[dbhinz]

VBox.png for 6.1.33

[Klaus Espenlaub]

The guest OS runs into a "triple fault" very quickly after starting to boot. Hard to tell why. Possibly an incompatibility with the installed kernel. Do you have another kernel available in GRUB?

[dbhinz]

Replying to klaus:

The guest OS runs into a "triple fault" very quickly after starting to boot. Hard to tell why. Possibly an incompatibility with the installed kernel. Do you have another kernel available in GRUB?

There are some other kernel versions available but I don't even get to the point in GRUB where I could select one of them. Is there any recovery at this point? I could try and create a new install of Fedora 33 and see if that works, but do need existing data from the Fedora 29 -> 31 install.