Hi,
I was trying to fill an existing pdf form using spire pdf. But it's throwing a System.ArgumentException in the font section.
'DirectCast((New System.Collections.Generic.Mscorlib_CollectionDebugView(Of Object)(fw.FieldsWidget.List).Items(0)), Spire.Pdf.Widget.PdfStyledFieldWidget).Font' threw an exception of type 'System.ArgumentException'
Attaching the file for your reference.