Self-check printing hangs

3.9.0/1

Getting a hang-up with the self-check when printing from Items Out or Holds:

Console error:

Cannot read properties of null (reading 'document')

selfcheck.js

Line:
win.document.body.innerHTML = data;

The bar loads and disappears after a while, but a print dialog doesn't come up. Doing this in Brave/Chromium.