To send us your save, use the "upload file" button:

                                                                                                                                                                                                         ^---This button right here

SAVE FILES

In My Documents\Endless Space 2\Save Files, you'll find .zip files 

Manual saves are going to be named whatever you named them when saving, Autosaves will look like this: AutoSave 3309.zip

Once again, make sure your give us the correct one by checking the turn / time of modification of the file.

Thanks for your report, we will look into it with your save.

THe save file is here BUG - I am the eternal end not working.zip