how to remove UUID during save file?

enter image description hereI am trying to use print js library in my demo application. I am following below url

https://printjs.crabbly.com/ (here there is some example + documentation ).

I am facing one issue in my demo application same in example also. when I am clicking print .It open in print window but when we try to save that file it come with UUID “cdcb9d0d-d8ce-4790-9403-a4c7690df5ff”

steps to reproduce this

  1. Go to https://printjs.crabbly.com/
  2. Click First example . it will open print window. Don’t print
  3. Try to save this file . it will show uuid why ?

Code

<button type="button" onclick="printJS('docs/printjs.pdf')">
    Print PDF
 </button>

enter image description here