While you save in Google Drive, it won't autosave. You have to save it manually.
For autosaving, use 'Local Storage'.
Try to download the file and open it directly.
Go to, 'Document'->Open->'Choose File' beneath 'From File'.
Then select your file.
It should open successfully.
I tried opening your file, and only the root node is shown. It says 'Partido Digital'