lampe-gtk not showing much at all

lampe on the cli displays all the lights just fine, but running the GTK version gives me no list of the lamps themselves; the bridge IP is displayed.

On the command line, missing objects occur: (lampe-gtk:3319): Json-CRITICAL **: json_node_get_object: assertion 'JSON_NODE_TYPE (node) == JSON_NODE_OBJECT' failed

(lampe-gtk:3319): Json-CRITICAL **: json_object_get_members: assertion 'object != NULL' failed

(lampe-gtk:3319): Json-CRITICAL **: json_node_get_object: assertion 'JSON_NODE_TYPE (node) == JSON_NODE_OBJECT' failed

(lampe-gtk:3319): Json-CRITICAL **: json_object_get_members: assertion 'object != NULL' failed