App crashes when attempting to publish to Google Photos - Json-CRITICAL

Please see the verbose flatpak output below and note the json error:

$ flatpak -v run org.gnome.Shotwell 
F: No installations directory in /etc/flatpak/installations.d. Skipping
F: Opening system flatpak installation at path /var/lib/flatpak
F: Opening user flatpak installation at path /home/ransur0t/.local/share/flatpak
F: Opening user flatpak installation at path /home/ransur0t/.local/share/flatpak
F: Opening system flatpak installation at path /var/lib/flatpak
F: Opening user flatpak installation at path /home/ransur0t/.local/share/flatpak
F: Opening system flatpak installation at path /var/lib/flatpak
F: Cleaning up unused container id 2071454154
F: Allocated instance id 3245151318
F: Add defaults in dir /org/gnome/Shotwell/
F: Add locks in dir /org/gnome/Shotwell/
F: Allowing wayland access
F: Allowing x11 access
F: Running 'bwrap --args 34 xdg-dbus-proxy --args=36'
F: Running 'bwrap --args 34 shotwell'

(shotwell:3): Gtk-WARNING **: 08:05:24.128: Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.

(shotwell:3): Json-CRITICAL **: 08:05:48.702: json_object_get_string_member: assertion 'node != NULL' failed
L 3 2019-07-12 08:05:48 [CRT] publishing_google_photos_album_construct: assertion 'name != NULL' failed

(shotwell:3): Json-CRITICAL **: 08:05:48.703: json_object_get_string_member: assertion 'node != NULL' failed


L 3 2019-07-12 08:05:48 [CRT] publishing_google_photos_album_construct: assertion 'name != NULL' failed

I have uninstalled and reinstalled Shotwell, and done a flatpak repair as well, yet the issue is not resolved.

Any help would be greatly appreciated.

Kind regards,