Trying to build project but getting: [!] Invalid Podfile file: no implicit conversion of nil into String.

[medic345]

When building project in xcode it fails and we get: [!] Invalid Podfile file: no implicit conversion of nil into String.

use_react_native!(:path => config["reactNativePath"])

I have tried changing

"> use_react_native!(:path => config["reactNativePath"])"

to config[:reactNativePath] in the pod file and we get a new fail build with:
[!] Unable to find a specification for React-Core depended upon by RNFBStorage

You have either:

• out-of-date source repos which you can update with pod repo update or with pod install --repo-update.
• mistyped the name or version.
• not added the source repo that hosts the Podspec to your Podfile.

[!] use_flipper is deprecated, use the flipper_configuration option in the use_react_native function

when re running pod install