Hi Sven,
Since the new archive is still empty, you can delete it and then create a new one under the main archive on the n4 server. To create the new one, go to the
jOrgan archive and click on "Options > Structure > Create new subcategory". You will see a checkbox "This is a mailing list archive" in the form. So please make sure it is checked and you will be able to setup the mailing list after submitting.
Sven Meier wrote
BTW the automatic migration offered by the administration UI failed with:
Could not initialize class nabble.model.NodeImpl$LazyExports
Thanks for reporting this. This bug has been fixed.