This post has a list of modules where their maintainers will need to be involved in converting them from the old module library because we couldn’t see how to do so sensibly. World in Flames is on that list.
I’m not seeing that. When I go to W and page ahead, I see an entry for it:
Editing isn’t working properly at the moment.
It’s unclear to me what on the old page should be brought over to the new module library. That should be determined before doing anything else.