Coreldraw X7 Crashes when exporting to PDF with some files

Hello.

I am new to the community so please bear with me. I am experiencing a new problem when exporting files to PDF where coreldraw x7 crashes. I have tried to investigate what is causing this. My only guess is using bitmaps and Gaussian blur as drop shadows.

I can share a document so someone can take a look. What is the process. Where do I upload?

Thank you