Hi Bret,
Thanks for your interest in Syncfusion components.
We have created a simple report with report parameters, query string in our report designer and we able to preview the report without any exception at our end. The report can be downloaded from the following location.
Note: We have used 2.2.0.13 version report designer for validation.
If you still face any issue then we request you to share a video demo or issue reproducing report with us. It will be helpful for us to provide the solution at the earliest.
Regards,
Vinoth S.