Hello experts,

I am developing few custom reports. All of them were working properly. Recently I had reset my Sandbox environment. I added few new fields to the custom report and when I publish and try to test it in Sandbox, I get the below error. I get the same error if I undo my changes and test. I am now totally clue less about this error.

I tried to create a new blank project in VS code and added a simple report. When I try to test the simple report, I get the same error.

Any advice on the issue would be highly appreciated. Many thanks...

Thanks & Regards,