Steps to reproduce

1.  On the publish workflow:preview-task click Action: Show Changes
2. Different from the Magnolia demo: Customer version does not open the dialog to choose language and versions, it goes directly to the diff view: /author/.magnolia/versionDiff?diffViewContentHandle=/DE/Home/Kontakt&fromVersionNr=1.0&toVersionNr=1.0
3. When it attempts to load, Magnolia logs in file: LOGS_FIRST_PROBLEM-EXTENDED_WORKFLOW_INCLUDED.txt
4. Customer have tried to find where the setup for this dialog is, but could not find, also customer do not overwrite any related module in our light module

.. Logs, screenshots, gifs...

Expected results

1. Please make it work somehow for our SPA editor. Without this extended module, it worked there.

.. Justify non-trivial expectations with a link to a doc or a relevant discussion.

Actual results

As described above

Workaround

N/A

Development notes

N/A