Help me debug a problem with chaining promises in JavaScript

I have several functions I call through chained promises, but am receiving an error described in this Reddit post. I've simplified the code to show the syntax I'm using, but if needed I can provide the full code of the function I am using.

https://www.reddit.com/r/learnjavascript/comments/qz3moz/cannot_read_properties_of_undefined_reading_then/hlmaae8/?context=3

If you can help me solve this, please bid the amount you can complete the project for.