Chromium-based Browsers: Export to png results in error

[phr0]

Describe the bug
Exporting a story as a png image results in an error being thrown and no png being exported, when using a chromium based browser.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://www.wps.de/modeler/index.html
2. Click on the "Export story as SVG or PNG image, or animated HTML" button
3. Click on "PNG"
4. No download starts and an error message appears in the dev console

Uncaught TypeError: Cannot read properties of undefined (reading 'parentNode')
    at extractSVG (pngDownload.js:107:5)
    at downloadPNG (pngDownload.js:23:13)
    at HTMLButtonElement.<anonymous> (app.js:546:3)

Expected behavior
After clicking the "PNG" button a download of the exported story as a png image should start.

Screenshots

Tested with

• Modeler Version: v1.3.2
• Browser: Microsoft Edge Version 107.0.1418.42 and Google Chrome Version 107.0.5304.107
• OS: Windows 10

[phr0]

Seems to me like this is caused by this commit from over three years ago: e4403da. If I just revert these changes, the download works as expected.