Error initializing StoryMap: You cannot upload content to files of type application/vnd.google-apps.folder

Hello,

We are trying to start a StoryMap, but nobody in our group is able to log in with our Google accounts. We get the error: "Error initializing StoryMap: You cannot upload content to files of type application/vnd.google-apps.folder" These are public Google accounts. It looks like StoryMap is having a problem creating a folder in the drive, but I'm not sure if this is on our end or StoryMap's. Does anyone have any tips?

Thanks!