Typings error on start without any modifications

[michelalbers]

Is this a bug report?

yes

Can you also reproduce the problem with npm 4.x?

yes

Which terms did you search for in User Guide?

Environment

react-scripts-ts@2.15.1
node@v9.11.1
npm@5.6.0
yarn@1.3.2

mac os X High Sierra

Steps to Reproduce

1. create-creact-app example ---scripts-version=react-scripts-ts
2. cd example/
3. yarn start

Expected Behavior

Compile and show example page

Actual Behavior

(2236,19): Interface 'Element' cannot simultaneously extend types 'ReactElement<any>' and 'ReactElement<any>'.                         
Named property 'type' of types 'ReactElement<any>' and 'ReactElement<any>' are not identical. ```

[mnadeau2]

having the same issue.

[josephfarina]

Also having the same issue. Any updates?

[DorianGrey]

Sounds a bit similar to:
#313
#341

Would you mind checking the output of npm ls @types/react for duplicates?