Errors running demo scene

This project seems awesome! I had a little trouble getting the demo to run. I downloaded the zipped file and installed at ./addons/gdosc/bin then recreated the demo scene.

Run scene:

Error: Method 'get_node' is not declared in the current class.

Current class is Object, so I tried changing both sender and receiver to Node.

Then, running returns this error:

Attempt to call function 'new' in base 'NativeScript' on a null instance.

Are the resource paths correct in the linked zip file? It looks like several go to: res://bin/gdosc.gdnlib rather than res://addons/gdosc/bin/gdosc.gdnlib. Altering these allows the scene to run.