The Picasa Web Albums Data API has been shut down and is no longer available.
The Picasa Web Albums Data API has been shut down, including all the end-points.
The following OAuth 2.0 scopes will cease to function, including both the HTTPS and HTTP scopes:
The Picasa Slideshow Widget has also been turned off.
To continue operating, applications using Picasa Web Albums Data API should migrate to Google Photos Library API .