Larian Studios Forums Divinity - Original Sin Divinity Original Sin - Mods EE pak extractor

In the screenshot, the source path is not filled it; it should be something like:
c:\Users\UserName\Documents\Larian Studios\Divinity Original Sin 2\PlayerProfiles\ProfileName\Savegames\Story\extracted_save\

You don't actually need to repack an extracted save file. The game will recognize the individual files as a save. Loading and re-saving would also repack the save files.