​@jvarughese23 

If you are working on 2024 R2, your Report Designer will need to be upgraded. 

https://community.acumatica.com/report-designer-237/after-an-upgrade-to-acumatica-erp-2024-r2-or-later-the-report-designer-installed-for-earlier-server-versions-was-no-longer-connecting-to-the-server-26646?tid=26646&fid=237

That’s different issue, please refer to the 

I am Having same issue - How to rectify it?

​@Umangpatel  i did the following it worked ...

Locate the Report Designer folder in the updated build directory (e.g., C:\Program Files\Acumatica ERP\Report Designer).

Cut (don’t copy) this folder and paste it outside the Acumatica directory (e.g., C:\ Report Designer or  Report Designer Backup).

Download an older, working version of the Acumatica ERP installer that includes the Report Designer (available from builds.acumatica.com or your partner portal).

Run the installer, selecting “Install Report Designer,” and specify the original updated build folder as the destination (e.g., C:\Program Files\Acumatica ERP\Report Designer).

Launch the Report Designer from the reinstalled folder—it should now work with your ERP instance.