VM created and runs ok, but after snapshot or shutdown refuses to restart...

[timjph]

Created Mojave 10.14.6 VM using "make all" all works fine - was able to login, run apps, update with latest security patches - etc.

However unable to restart VM after quitting Virtual box:

1. If make a snapshot to save the state, fails to complete restore correctly:

Fails with message:

"Failed to open a session for the virtual machine...

ahci#0: The target VM is missing a device on port 1. Please make sure the source and target VMs have compatible storage configurations [ver=9 pass=final] (VERR_SSM_LOAD_CONFIG_MISMATCH).

2. if shut the machine down and then try and restart, fails differently:

Drops into UEFI Shell, failing to find a bootable device.

Exiting from UEFI shell an trying to manually attach using 'Boot Maintenance Manager' + 'Boot From File' gives only one option "EFI, [PciRoot (0x0) ..." - selecting and following subdirectories leads to apfs.efi and selecting does nothing.

Best wishes,
Tim

[timjph]

p.s. using Virtual Box Version 6.1.4 r136177 (Qt5.6.3)