I get this error after installing gnome photos, running it and running it via the terminal:
~ $ gnome-photos
(org.gnome.Photos:3342): GLib-GIO-ERROR **: 07:40:49.084: Settings schema 'org.freedesktop.Tracker.Miner.Files' is not installed
Trace/breakpoint trap
Additionally, the icon does not even show up in the brisk menu or desktop. ( I am running MATE DE.)