Can you please update to the latest version of Mojave (10.14.2) and see if issue persists ?
An error occurred while saving the commentMartin Behrens commented
Having the same issues as all the others here: I am not able to use Acrobat Pro DC for anything -- it crashes nearly everytime when I try to open and view a PDF. I can't even try editing because the app crashed. We are paying for this, it should be fixed asap!