0xc03a001a = Virtual hard disk files must be uncompressed and unencrypted and must not be sparse.
There are multiple drivers.
Are any in RAID? Compressed?
See if these links have useful information:
https://social.technet.microsoft.com/Forums/en-US/757c76ba-a772-4dde-8baa-4db6de1016ce/vhd-must-be-uncompressed-and-unencrypted?forum=winserverhyperv
https://github.com/microsoft/WSL/issues/4103
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