that's already been explained and stated clearly :

Originally Posted by Issh
the patch 20 min ago solved the 'Black Cove' issue. [...] the following update will allow those savegames to be played, whereas now you are getting this error code instead.


Just be patient... You can trust the developers to do their best to keep players happy ; so the patch will be made available when they have a solution. Knowing they are working on it and that an update in the pipeline is enough.