@haisuw65 please try to always provide a clearly-defined issue by writing text rather than just adding a screenshot.
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This error occurs when the Visual Business Director is unable to access the Real-Time Data Grid (RTDG) service due to missing or non-functional RTDG nodes. Here are the most common causes and solutions:
- RTDG service configuration:
- Make sure that the RTDG service has started correctly
- Make sure at least one Pega Platform node is assigned the RTDG node type
- Make sure the Decision Data Store service is configured to record customer responses
- System migration:
- If your system has previously used Hazelcast, verify that the migration to the new RTDG architecture has been successfully completed
- This is especially important after an update to Pega Platform 23 or later
- Quick Resolution Steps:
- Check the assignment of RTDG nodes in your system configuration
- Make sure the RTDG nodes are working properly
- If necessary, try restarting the RTDG nodes
Refer to the official documentation for detailed configuration steps: Configuring the Real-time Data Grid service