Hey @thezluf,
You would need to import in the Couchbase Lite libraries into the project. After cloning the project…
$ cd couchbase-lite-android
this is found under the ‘libraries’ folder. From within the ‘couchbase-lite-android’ folder, execute the command:
git submodule update --init --recursive
In your Android Studio, re-sync your Gradle files and the error should disappear. I have also updated the GrocerySync-Android project instructions to list this step more explicitly.
Hope this helps!