Hi @vk8536
I'm sorry I don't know much about Acrobat readers.
I did a simple test, my environment is sql server 2019 and SSRS 2019.I downloaded the following version of the reader, but I can't reproduce your error, it was able to successfully open my simple report exported to PDF format.
Could it be a version issue with Adobe Acrobat? Reporting Services supports Adobe Acrobat 11.0 or later.
For more details, you can refer to this link: https://learn.microsoft.com/en-us/sql/reporting-services/report-builder/exporting-to-a-pdf-file-report-builder-and-ssrs?view=sql-server-ver16.
Best regards,
Aniya