The error that appears is this:
[ERROR]: couldn't open file at res://DialogScripts/BookcaseAsHuman.json. Error number 7.
[ERROR]: not a valid whiskers data, it has not the key Start.
SCRIPT ERROR: set_text_portion: Invalid get index 'text' (on base: 'Dictionary').
At: res://Scripts/UI/dialog_box.gdc:23
sending instruction to actor_dialog