@Polina_Zenevich I had noticed the same thing as @X_Yuan and thought it has something to do with permissions (that was an issue when using an external tool like pdfmonkey.io). So I decided to export the notes into markdown and try and print them using VS Code.
I noticed something strange (and potential 
bug) in the markdown export, where images are included:
I think the image file extensions are missing in the file path:
I am not sure if that is the cause of the OP’s issue, but thought it might be worth investigating. PDF export (and ability to use more complex templates) is definitely something I would find really helpful, but this might be a good interim fix to at least be able to print full PDFs