Issue: A wiki node with the title Categorie-euml-n could not be found.

Were you able to visit the area before you moved the category? Are you able to visit the actual area now? Was it just that you were redirected to an invalid URL after the move was completed?

In my tests on XenForo, I have not been able to reproduce any redirection problem when moving single pages or multiple pages, both in and out of areas called Tëbäa or Tébäa, even when the moved pages also had names with special characters like categorieën.

I have changed the name and replaced ë with e. Now everything works fine. If I change it back the links in vaultwiki front end fail.

Do you have a replacement defined for that character in Wiki Admin Panel > Languages > Replacement Manager?

None.

Do you experience a problem with this character in titles of regular (not area) pages? What method are you using to enter this character?

Unfortunately, as I have mentioned, I have been unable to reproduce a routing problem with the ë character against my XenForo wiki. It might be an encoding issue isolated to a combination of settings in your server configuration. We will probably need to use a Ticket to investigate this further.

Did this problem occur after your most recent import attempt?

No this is a fresh xenforo install. No import.