iText.Kernel.Exceptions.PdfException: 'Unknown PdfException.'

I'm using itext to generate pdf as follows:

public void RenderPage(string filePath)
{
    using (var writer = new PdfWriter(filePath))
    {
        using (var pdf = new PdfDocument(writer))
        {
            var document = new Document(pdf);

            foreach (var componentRenderer in _reportComponentRenderer)
            {
                componentRenderer.Value.Render(document);
            }
        }
    }
}

<PackageReference Include="itext" Version="9.0.0" />

Getting following errors:

iText.Kernel.Exceptions.PdfException: 'Unknown PdfException.'

NotSupportedException: Either com.itextpdf:bouncy-castle-adapter or com.itextpdf:bouncy-castle-fips-adapter dependency must be added in order to use BouncyCastleFactoryCreator