Please email your latest save (or a Dropbox or Google drive link, etc) to supportdos2@larian.com, and if available, your most recent save before moving to the Nameless Isle and the oldest after.
Each save is a folder in the '..\Documents\Larian Studios\Divinity Original Sin 2\PlayerProfiles\<ProfileName>\Savegames\Story' folder.
In Windows Explorer you can zip file(s) and folder(s) by right clicking on it/them and selecting 'Send To | Compressed (zipped) Folder'.