The Problem has been solved

currentPosition.kt

//CURRENT POSITION
class ClubsViewModel<T> (clazz: Class<T>) :  BaseViewModel<T>(clazz) {      //<<  THIS IS WHERE THE CURRENT PROBLEM WAS.

    private var _mClubs = MutableLiveData<List<T>>()
     listenToFireStoreCollection("Clubs", _mClubs)

...
}

class BViewModel<T> (clazz: Class<T>) :  BaseViewModel<T>(clazz) {          //<<   THIS IS WHERE THE CURRENT PROBLEM WAS.

    private var _mBs = MutableLiveData<List<T>>()
    listenToFireStoreCollection("Bname", _mBs)
...
}

class BaseViewModel<T>(val clazz: Class<T>) {
    protected val mFirestore = Firebase.firestore

    protected  fun listenToFireStoreCollection(val collectionName: String, liveData: MutableLiveData<List<T>>) 
        mFirestore.collection(collectionName).addSnapshotListener { snapshot, e ->
            // if there is an exception we want to skip.
            if (e != null) {
                return@addSnapshotListener
            }
            // if we are here, we did not encounter an exception
            if (snapshot != null) {
                liveData.value = snapshot.documents.mapNotNull { it.toObject(clazz) }
            }
        }
    }
}
//FRAGMENT EXAMPLES.
class ClubsFragment : Fragment() {

    private val mClubsViewModel: ClubsViewModel<ClubsFSEntity> by viewModels()
...
}
class BsFragment : Fragment() {

    private val mBsViewModel: BsViewModel<BsFSEntity> by viewModels()
...
}