We have discovered this error occurs because players do not yet have a ini file.
This is configured by the patcher which we took offline.
So we have brought the update server back online but removed the actual update from it.
Users who downloaded the Patcher Only installer today will still need to download the full installer or wait until next week when we return the update server to its normal function.
Please run the patcher. (double click the Novus Aeterno shortcut on your desktop)
Hit update. (this will do nothing)
Update will change to Launch, click that and everything should work.