Report BI Server Embeding a report by Yarp Reverse Proxy

Thank you d_gosbell 

Hi, pelitahmet 

I think you should configure the reverse proxy as instructed in the official documentation. Your problem appears on the report authentication page, which means that you are accessing the report through a reverse proxy server
server server failed to pass or an incorrect authorization was passed to the report server.
Here are the documents you should refer to and learn:

Creating the Web Service Proxy - SQL Server Reporting Services (SSRS) | Microsoft Learn

Alternatively, you can refer to the existing GitHub open source project, which uses yarp to proxy the report server:

GitHub - mikedoerfler/ssrs-proxy: Learning about YARP and proxying request to SSRS Reports and ReportServer web apps

Best Regards

Jianpeng Li

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