We have new text coming for that page. That page relates to the OGL, the page was taken down long ago, and there was some confusion during launch, and about the edits required to that page before it could go back up.
It’s ORC and there are no restrictions to public domain material, only Reserved Material i.e. Chaosium IP in the Core Book or Third Party IP you don’t have a license for.
It’s the weekend. We spotted the issue yesterday, but I need someone who is travelling to update it. The statement on the SRD is correct
QuestWorlds/0.1_Legal_Information.md at master · ChaosiumInc/QuestWorlds (it has no Reserved Material so the trademark reminder is mostly redundant) as is the statement in the Core Book.
That page is also meaningless for BRP btw
Ian Cooper
Chaosium QuestWorlds Line Editor