Hi @Ulysses Brown ,
Could you please help check the below situations to see if it will work.
Option1.Run the VS as Administrator and then preview the report.
Option2. Right click on the report you want to preview in your Solution Explorer and click RUN to preview.
Option3.Choose the report in the report web portal and edit in the Report Builder to see if you could preview the report.
Regards,
Zoe
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