This error typically manifests when you attempt to start a runtime project that includes data logging, archiving, or historical trending. Instead of seeing your data logs, the system either fails to start the runtime or runs in a degraded "demo" mode where logging is disabled or watermarked.
and download the project to the Runtime PC again to clear any software glitches. Siemens SiePortal order codes for the logging license or help checking your project for unintentional log configurations license key not available wincc logging for runtime advanced