TypeError cannot read property 'start' of null

[Joaquim-Frances]

Hello I'm getting always this error: TypeError cannot read property 'start' of null

I checked everything many times and looks in place. Any help?

[kreativeAfaq]

same issue

[gabrielpdsilva]

After adding the lib, try uninstalling the app and install it again. In android for example, after uninstalling it just run:

yarn android
yarn start