Anyone seen this error when trying to edit a VM? Happens whether we add a disk, disconnect a NIC. 6.7 Vcenter with 6.0 hosts..
Is there anything mapped to ide0:0? If not, easier option would be to create a new VM with the same specifications (without a disk) and attach the existing disks and other necessary devices to the new VM.
Did you try:
I had such issue in vSphere 6.0 and this helped.