If you don't have a recent save before loosing access to the Hall of Heroes, you can email your latest save (or a Dropbox or Google drive link, etc) to supportdos@larian.com, with a description, or link to your post here.

Each save is a folder in the '..\Documents\Larian Studios\Divinity Original Sin Enhanced Edition\PlayerProfiles\<ProfileName>\Savegames_patch' folder.
In Windows Explorer you can zip a file or folder by right clicking on it/them and selecting 'Send To | Compressed (zipper) Folder'.