Sorry, the owner hasn't given you permission to download this file in Google Drive

If you're unable to access a file that you could open before, or if you can't access a file or folder that was shared with you, there are a couple of possibilities.

• The file owner hasn't granted you access to the file.
• You were removed from the list of people with access.
• The owner of the file deleted it.

If you have the link to the file or an email where the file was shared, you can request access to it. Visit the URL, then click the Request access button on the page that says you don't have access.

This Solution for Site Owner(not user)

Goto Google Drive:

Follow the Step  

 Right Click Your File ---->Click Allow Viewers to Download

Now you can download the file................