Greetings!
Migrating from Aspose 20 to 22 makes PdfSavingOptions change from SavingOptions to FixedSavingOptions.
In the early version, the one using version 20.5.0, we have:
new Aspose.Words.Saving.PdfSaveOptions
{
…...PdfA1b, OptimizeOutput = true, PageIndex...Words.Saving.PdfCompliance.PdfA1b, OptimizeOutput = true, PageSet...