Unexpected token "{". Import call expects exactly one argument

[canyavall]

One week ago everything was working perfectly fine. I came back from holidays and pulled all new code from my coleagues. Executed yarn run-android and I got this message:

Unexpected token "{". Import call expects exactly one argument

I thought, ok, maybe some code from my coleagues broke it so I create a branch from the last working state and nothing, same issue...

Since then (2days) I've been trying everything that came to my mind (gradlew clear, clean cache from yarn and npm, remove node_modules (a lot of times)... and nothing works...

One thing that's strange is the metro bundler path:

React Native version:
React Native Environment Info:
System:
OS: Windows 10
CPU: (4) x64 Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz
Memory: 5.85 GB / 15.88 GB
Binaries:
Yarn: 1.15.2 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
npm: 6.4.1 - C:\Program Files\nodejs\npm.CMD
IDEs:
Android Studio: Version 3.3.0.0 AI-182.5107.16.33.5264788

Steps To Reproduce

1.Just run react-native run-android and done...

Snack, code example, or link to a repository: I really don't know which code paste as it really breaks before bundling...

[canyavall]

I kept investigating and, incredibly, if in the index.js between the imports I write a console.log

import {AppRegistry} from 'react-native';
console.log("Yeaaaaahhhh")
import AppNative from './native/App.native';

Then it works.....

If I remove it, then it stops working....

[canyavall]

So, for what I can see, the babel.config.js file is not being loaded on time in windows10, so the transpile is not taking place...

[canyavall]

Doing wha tthis link say: https://medium.com/@abhisheknalwaya/how-to-clear-react-native-cache-c435c258834e and deleting the yarn.lock fixed it

[wuweijian1997]

nice。
I solved the problem with this line of code.
`
cd android &&

./gradlew cleanBuildCache
`

windows & android

[arjndr]

for anyone that's stuck yarn start --reset-cache will do the trick