On MAC OS version 10.15.07 (Catalina) - I upgraded Fusion 11 to Fusion 12 in preparation for upgrade to Big Sur. Fusion was running a Windows 10 VM with no problems previously. After the Fusion upgrade and then converting the Windows VM, I get the following when I try to boot the Windows 10 VM. "Cannot assign available PCI slot to "vmci0' There are no more PCI slots available in the virtual machine. Please remove some devices from he virtual machine"