Hi Lasya,
I've seen the video. I think you need to use NEO_ schema (the development schema) instead of DEV_ schema (the private schema). That's the problem maybe. In your case, use NEO_8A9HHFY063W4GFVA94ILJLXAC instead of DEV_8A9HHFY063W4GFVA94ILJLXAC. Can you please give it a shot?
Best regards,
Wenjun