CSV file generated is empty

Hi everyone, 

I'm working on a project to extract data from account statements. I'm using .NET for this process. However, I've noticed that when requesting the following parameters:

// Create parameters for the job
ExtractPDFParams extractPDFParams = ExtractPDFParams.ExtractPDFParamsBuilder()
        .AddElementsToExtract(new List<ExtractElementType>(new[]
            { ExtractElementType.TEXT, ExtractElementType.TABLES }))
        .AddElementsToExtractRenditions(
            new List<ExtractRenditionsElementType>(new[] { ExtractRenditionsElementType.TABLES }))
        .AddTableStructureFormat(TableStructureType.CSV)
        .Build();

 the CSV files are generated empty
The PNG images look correct.

Another thing that I have noticed is that the JSON does not have text related to the account statements.

I hope you can help me, thank you! I really want to make the most of this tool, but I'm starting to have doubts about whether it is truly functional or not.

Is there a way to train the AI to obtain more accurate data?