Problem with the tutorial

[eyalgo]

I am following the tutorial and the code at GitHub.
I keep getting an exception:

Uncaught Error: Objects are not valid as a React child (found: SyntaxError: Unexpected end of input). If you meant to render a collection of children, use an array instead.

I also added mode: no-cors to the fetch block.

Any idea what's wrong?

(BTW, https://camilosw.github.io/react-hooks-services/ shows there's a problem)

Thanks