Currently when users of v12 end up in a state where Realm is not compiled/available in their environment (for example: for got to pod install or tried expo web or expo go), the error returned is:

TypeError: Cannot read property 'Helpers_get_table' of undefined

This is misleading and can lead to frustration, as it is very unclear what the issue actually is. We should create a check for this problem and respond with a meaningful error message such as:

Realm could not be found in your environment.  Make sure you have followed the setup instructions at https://www.mongodb.com/docs/realm/sdk/react-native/install/

We also could create a TROUBLESHOOTING.md which goes provides some general guidance specific to these type of errors. If this is done, than it should be linked in instead of the mdb installation docs.