Instead of saving final output to PDF, can you please also save the final output to DOCX format, ZIP this DOCX file and share the ZIP file here for further testing?
Please also create a standalone simple Console application (source code without compilation errors) that helps us to reproduce your current problems on our end and attach it here for testing. Please do not include Aspose.Words DLL files in it to reduce the file size.
As soon as you get these pieces of information ready, we will start further investigation into your scenario and provide you more information. Thanks for your cooperation.