Error: failed to set spine skin for gui node

I’m following the 2D Platformer Creation Kit. I have added my first dialogue, but I get this error (some debug lines also included before the error):

DEBUG:SCRIPT: enemy
DEBUG:SCRIPT: getting triggered
DEBUG:SCRIPT: destroying speech bubble, probably id: -1
DEBUG:SCRIPT: making new bubble, id: 1
ERROR:SCRIPT: platformer_creation_kit/framework/gui_scripts/speech.gui_sc:83: failed to set spine skin for gui node
stack traceback:
[C]: in function ‘set_spine_skin’
platformer_creation_kit/framework/gui_scripts/speech.gui_sc:83: in function <platformer_creation_kit/framework/gui_scripts/speech.gui_sc:67>
ERROR:GAMESYS: Error when dispatching message to gui scene: -2. Message ‘new_speech_bubble’ sent from default:/speech_controller#script to default:/speech_controller#gui.

Image from the level in this message.

I’ve never used the Platform Creation Kit extension. Have you reached out to any of the devs of the extension?

I made a comment on their tutorial page, but I have not received a response. Their website seems to be under construction the last time I checked.

Regarding the problem where they tell the reader to have the “hero” texture I did not follow that direction and left the speech_content.lua intact and now it works again. Maybe there is no “hero” texture that could be used?