Nova and styles on a 3rd party package after Nova upgrade

After spending hours and hours on Nova upgrade from 3 to 4 (including the Laravel upgrades from 8 to 9 and PHP upgrade from 8.1 to 8.3) I found out that the Nova Translation editor I used had died in the version 3 and finally found a translation editor that works on Nova 4 (which also has been archived https://github.com/bernhardh/nova-translation-editor)

If you know some up to date Nova Translation Editor I would be keen on that.

Meanwhile the now in use translation editor seems to work pretty ok but the styles on the editing page are not working. See the screenshot of the problem.

Have I missed something while upgrading and the styles are not build correctly or why is it acting like that?