User2288 In my case, without Network permission allowed and without GSF installed I have to do this to GPhotos work:
1) Allow Network Permission to GPhotos
2) Open the app
3) Close the app, after a few seconds
4) Disallow Network Permission to GPhotos
After that, the app will work fine for a while (some days) but after the editor, share or delete refuses to work and is needed to remove app data then exec previously described steps again.