Today, I received a trouble report that the plug-in was failing with the following:
Unfortunately, this may be an indication that Shutterfly has finally shut down their developer API after several years of letting it run on auto-pilot. There’s always a chance it’ll start working again, but, after a nearly 12 year run, this may spell the end of the Shutterfly Upload plug-in. RIP.
Stay safe out there, get vaccinated, and wear your mask! 😷👍
UPDATE 03/06/2021:
Shutterfly customer support shared the following via “chat:”
I do apologize but I am seeing here that the API had been discontinued and you are able to upload the photos via the website at shutterfly.com.
Unfortunately, they had no information regarding when the API was “discontinued” (it may have been recently when the failures started happening, or it may have been years ago when all of the API documentation disappeared, and developer support stopped responding to email). The bottom line is that it doesn’t look good for a resurrection of the plug-in. ☹