I’m having the exact same issue – approx 6 email addresses in a list of 200+ can’t be synced. Same error as well.
Hi there, I was logging in as a test user who only has subscriber access to the site.
The test user ‘John’ has been allowed to see one gallery only, as shown in the gallery title. However, when I log in as John, I can see both.
If I am logged out, no galleries are visible, which is excellent. Just need to be able to hide the galleries from people who aren’t listed in the privacy settings.