I can’t see any thumbnails!
One of the most common errors Sunshine users seem to be having is thumbnail images not appearing in their galleries. This article explains how to prevent this in 9 out of 10 cases.
The most common culprit for missing thumbnail images is Jetpack’s Photon extension. If you have Jetpack installed and Photon enabled, you will need to disable it. Unfortunately Sunshine and Photo simply do not work together at the moment.