The error you get is a general error.
In the ESXi logs there is probably a much meaningful error message.
In short, setting the ChangeVersion field to "any" value (and not the one that you retrieve from the VM), causes a problem.
The hypervisor uses this to avoid concurrent updates that cancel each other out.
And this is one of the many drawbacks of using Onyx generated code !
It will show the correct value in the property for the run where you used Onyx to capture the method call.
But the Onyx generated code doesn't show where that value came from.
So whenever Onyx gives you code with a static value in there, check the property description to understand what the value, and where it should come from !