'SSRS 2019 Report Renders but does not export to csv

I am working with SSRS 2019 and VS 2019. We have a number of SSRS reports that render, can export to Excel, and export as a CSV without a problem. However, one report will render, export to Excel, but when exporting to a CSV even though it has data in the report it is empty. I am at a loss for why this would happen. Any suggestions?

This happens whether I Preview this report in Visual Studio or run it thought SSRS.



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