Hi @HarNagaraj ,
Based on your description and the provided screenshot of the error, the issue may be about whether your certificate is matched or enabled. I checked the documentation about the issue and I queried that firstly, in case of self-signed certificates, such certificates are not trusted by default and need to be manually trusted by the user. Secondly, into if the certificate is expired it will not be trusted and needs to be renewed. Finally, some browsers require additional certificates to link SSL certificates to trusted sources, you can access the site using HTTPS and check the certificate information in the browser. Of course, you also need to make sure that TLS 1.2 is enabled.
For more information you can check these documents
How to fix 'Could not establish trust relationship for the SSL/TLS secure channel' - Microsoft Q&A
Transport Layer Security (TLS) registry settings | Microsoft Learn
Upgrade the TLS version of your Power BI application to TLS 1.2 | Azure updates | Microsoft Azure
Best regards,
Albert He
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