truffle unbox react have Type error default.then is not a function

Question

Recently, I used truffle unbox example: (https://github.com/truffle-box/react-box)

But, I have facing big problem. When I run my App.js with npm run start, It hasn't compile error. However, when I connect my application on web browser, It appear error, like this:

I also upgraded my nodejs and npm version, but all my attempting is fail.

My nodejs version is 7.10.1 and npm version is 6.4.1.

Why does this error occur? and what is the solution to solve this problem?

Answer 1

What worked for me was calling getWeb3 as a function, then chaining the then. so instead of getWeb3.then, it's getWeb3().then.