That's quite unexpected. Can you reconfigure your failing VM with 7.0 virtual hardware down to 6.7 compatibility and see if it starts working? If you can obtain a vmware.log from a failed attempt to boot, and attach it to your reply, I'll take a peek.
Sure thing. I had the original VM as 7.0 hardware. Dropped it to 6.7 and it did boot the ISO. When I was having this issue. I deleted the VM out of spite.
I just re-created a 7.0 VM and it booted the Windows 10 ISO with no issues. Go figure. I'll see if I can re-create what was happening yesterday, but not sure I will be able to now.
I have this exact same issue, though i cannot recreate the issue with a Windows ISO atm, but when trying to boot a Sophos UTM ISO it refuses to boot, but also refuses to boot on Virtual Hardware v15. I tried downloading the ISO from the datastore and run it in VMware Workstation 15, and it was booting fine here.
Attaching logs from when trying to boot to Sophos UTM.
vmware.log.zip 18.1 K