Unable to install 10.13.5

[hw007]

OK, so maybe some of you can help out

I'm on 10.3.3
Using latest clover 4509, updated from Clover Configurator (made sure vboxhsf64.efi is checked)
Rebooted to confirm it was working.

I have added the latest apfs.efi to /Volumes/EFI/EFI/CLOVER/drivers64UEFI/

Downloaded the 10.13.5 combo update

I get the error "The installation failed" see attached image

I have tried the following;

10.13.4 Standalone - same error
10.13.4 Combo - same error
10.13.5 Standalone - same error
10.13.5 Combo - same error

I cannot for the life of me figure out why?

I've downloaded the updates 5 / 6 times, to ensure that they are not corrupted

Any ideas?

 

[hw007]

Anyone?