Cannot read property 'slice' of undefined (react-native)

[ghost]

I'm trying to use "node-libs-react-native" as an alternative to "rn-nodeify" in my project. when app first launch always get error "Cannot read property 'slice' of undefined"

but if i remove the function sdk when opening the app for the first time and re-add it when the app has launched everything works again without any error. can someone help me?