--- title: Orchestrator SignalR Issues slug: 9Lci-orchestrator-signalr-issues createdAt: 2025-07-28T19:32:10.034Z --- Here are some common issues with Activate Web Portal talking to Activate Orchestrator via SignalR and the possible cause. | **Error** | **Possible Cause** | | --------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------- | | One or more errors occurred. (No connection could be made because the target machine actively refused it.
| Orchestrator is not running. | | TLS/SSL Error | Thumbprint on Resources/Configuration/OrchestratorPorts is not configured correctly, this should be the thumbprint of the certificate used on the IIS binding |