Deployment step not supported by polymorphic type 'OrchardCore.Deployment.DeploymentStep'.

[weirdyang]

NotSupportedException: Runtime type 'OrchardCore.WorkflowPlus.Deployment.WorkflowTypeDeploymentStep' is not supported by polymorphic type 'OrchardCore.Deployment.DeploymentStep'.
System.Text.Json.ThrowHelper.ThrowNotSupportedException_RuntimeTypeNotSupported(Type baseType, Type runtimeType)

NotSupportedException: Runtime type 'OrchardCore.WorkflowPlus.Deployment.WorkflowTypeDeploymentStep' is not supported by polymorphic type 'OrchardCore.Deployment.DeploymentStep'. Path: $.DeploymentSteps.
System.Text.Json.ThrowHelper.ThrowNotSupportedException(ref WriteStack state, NotSupportedException ex)

I am porting my module from 1.4 to 2.0.0, I have a deployment step and I'm not sure why is it throwing an error after upgrading to 2.0.0. It seems to be something to do with System.Text.Json serialization. I compared my class to the workflow deployment step, and I don't see any difference.

Any advice is appreciated

    public class WorkflowTypeDeploymentStep : DeploymentStep
    {
        public WorkflowTypeDeploymentStep()
        {
            Name = "WorkflowType";
        }

        public string[] WorkflowTypes { get; set; }
        public bool ExportAsSetupRecipe { get; set; }
    }

[weirdyang]

https://docs.orchardcore.net/en/latest/releases/2.0.0/#drop-newtonsoftjson-support
found my answers here. sorry.