Reproduction:
- File > New
- Add a cluster icon (master by default)
- Configure a workload
- 'Simulate'
Error window shows up with the error 'One or more parameters have not been configured.', which is an error indicating that the parser has not identified any icon elements with the 'master' attribute.
Details

Solution
WrappedDocument::hasNoMasters only considers 'machine' elements, need to consider 'cluster' as well.