error log of SSRS data-driven subscription

Hi, SolomonovAnton 

Go to the Subscriptions tab in the web portal of Power BI Report Server. Find the status of your data-driven subscription. If there is an error, the status will show the problem.
Detailed error information is logged in the Reporting Service logs. These logs are typically located at:

C:\Program Files\Microsoft Power BI Report Server\PBIRS\LogFiles

Open the relevant log file and search for entries related to your subscription.
You can also query the ExecutionLog3 view in the ReportServer database for details about subscription executions. This view includes columns such as Status and Error, which can help identify issues.

You can check the following links:

Troubleshoot Reporting Services subscriptions and delivery - SQL Server Reporting Services (SSRS) | Microsoft Learn

Monitor Reporting Services subscriptions - SQL Server Reporting Services (SSRS) | Microsoft Learn

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Best Regards

Yongkang Hua

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