Please email supportdos2@larian.com with your save near the end of combat with the voidlings (or a Dropbox or Google drive link, etc), as well as in/before the fight on the Lady Vengeance, if you still have the saves from your original playthrough. If you are using any non-Larian mods, besides the one to start in Reaper's Coast, also include a list of those enabled and/or the modsettings.lsx file from your profile folder.
Each save is a folder in the '..\Documents\Larian Studios\Divinity Original Sin 2 Definitive Edition\PlayerProfiles\<ProfileName>\Savegames\Story' folder.
In Windows Explorer you can zip a file or folder by right clicking on it/them and selecting 'Send To | Compressed (zipped) Folder' (and similarly in OSX/Finder).