Restoring ESXi from the 6.7 version config bundle backup after upgrading to 7.0 u3 fails with this error.
(vmodl.fault.SystemError) {
faultCause = (vmodl.MethodFault) null,
faultMessage = <unset>,
reason = ""
msg = "Received SOAP response fault from [<<io_obj p:0x0000005d7c1acdf8, h:5, <TCP '127.0.0.1 : 41889'>, <TCP '127.0.0.1 : 8307'>>, /sdk>]: restoreConfiguration
A general system error occurred: "