I've slowly been working through this book and a few weeks ago got to deploying the api. I ran the curl request and it returned what was expected. I then took a break for a while and am just coming back. I tried running the curl request again just to make sure it was working and I am not getting the {"data":{'notes":[]}} that is expected anymore. I'm not sure what happened. I tried deleting the heroku app and created a new one with the same config vars and the only thing I get back is empty HTML saying there's an error and "cannot POST".

I want to make sure it is all working properly before continuing in the book.