[BUG] ELSA 3.3.0-rc3: Cancelling of Workflow Instance via REST API fails

[r-kernberger]

Description

When Executing the Cancel Endpoint of the ELSA 3 REST API there is an Exception stating that there is no handler for CancelWorkflowsCommand available.

So Cancelling is not possible via REST.

Is this a known issue?

Find the Stacktrace and screenshot of Swagger result below:

System.InvalidOperationException: There is no handler to handle the Elsa.Workflows.Runtime.Commands.CancelWorkflowsCommand command
   at Elsa.Mediator.Middleware.Command.Components.CommandHandlerInvokerMiddleware.InvokeAsync(CommandContext context)
   at Elsa.Mediator.Middleware.Command.CommandPipeline.InvokeAsync(CommandContext context)
   at Elsa.Mediator.Services.DefaultMediator.SendAsync(ICommand command, ICommandStrategy strategy, CancellationToken cancellationToken)
   at Elsa.Workflows.Runtime.BackgroundWorkflowCancellationDispatcher.DispatchAsync(DispatchCancelWorkflowRequest request, CancellationToken cancellationToken)
   at Elsa.Workflows.Runtime.WorkflowCancellationService.CancelWorkflows(IList`1 workflowInstances, CancellationToken cancellationToken)
   at Elsa.Workflows.Runtime.WorkflowCancellationService.CancelWorkflowAsync(String workflowInstanceId, CancellationToken cancellationToken)
   at Elsa.Workflows.Api.Endpoints.WorkflowInstances.Cancel.Cancel.HandleAsync(Request request, CancellationToken cancellationToken)
   at FastEndpoints.Endpoint`2.ExecAsync(CancellationToken ct)
   at FastEndpoints.Endpoint`2.ExecAsync(CancellationToken ct)
   at NSwag.AspNetCore.Middlewares.SwaggerUiIndexMiddleware.Invoke(HttpContext context)
   at NSwag.AspNetCore.Middlewares.RedirectToIndexMiddleware.Invoke(HttpContext context)
   at NSwag.AspNetCore.Middlewares.SwaggerUiIndexMiddleware.Invoke(HttpContext context)
   at NSwag.AspNetCore.Middlewares.RedirectToIndexMiddleware.Invoke(HttpContext context)
   at NSwag.AspNetCore.Middlewares.OpenApiDocumentMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)`