I'll pm the code to you. Save it as a .json file in your plugins folder.
All it is is a .json file inside a folder anyway. Compressed into a .zip file. Shared to drive. Copied share link into telegraph page.
In incognito mode, i just followed the link from the showcase page, followed the link from the telegra.ph page, pressed download, opened from the download message, extracted, and viewed the file.
Possible causes of your errors:
- You may not have google drive installed.
Google drive may not be a recent version.
Your browser may have downloads disabled in the settings.