Hi Alan, bumped into this just a few hours ago myself. The docs on this are terrible at telling you what you should provide. (Thankfully, that is a rarity!)
In my case, I had printed a start_link/1 function, but I needed to provide a start_link/2 function. Took me a while to get that right.
In your code, in see three different models name prefixes: App, Jaeger, and Jeager. Perhaps this is as simple as a typo?
