C# RDLC Report Viewer LocalReport Execute crashes

Question

I am trying to render a byte array from an RDLC file. I've done it successfully with one .rdlc but I am having issues with another. Below is my code.

    Dictionary<string, string> parameters = new Dictionary<string, string>();
    parameters.Add("ShowStates","2020");
    Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
    Encoding.GetEncoding("windows-1252");
    LocalReport report = new LocalReport(rdlcFilePath);

    var DS1 = await GetStatusReportwithFileCounts(ReportYear);
    var DS2 = GetOverallStatus(ReportYear, DS1);
    report.AddDataSource("Status_reports_SummaryDB", DS1);
    report.AddDataSource("Overall", DS2);
    var result = report.Execute(RenderType.Pdf, 1, parameters);
    return result.MainStream;

I know my DataSources are returning good data and my rdlc path is correct. For reference, we are using .Net Core, so my report rendering options seem limited. I assume the error lies within something in the .rdlc file it's self. I guess my greatest issue is I'm not really sure how to interpret the error message (Below). Any insight on where to look for errors would be appreciated.