Не отображается recyclerview в fragment

Программа запускается без каких либо серьёзных проблем, но вылезает ошибка "E/RecyclerView: No adapter attached; skipping layout E/RecyclerView: No adapter attached; skipping layout" Скорее всего из-за чего и на экране ничего не отображается. Помогите пожалуйста уже 3 день мучаюсь с этой проблемой. Что мне нужно сделать?

Нижу прикрепляю свой код:

Класс CatalogFragment:

class CatalogFragment : Fragment(R.layout.fragment_catalog) {
private var categoryRc: RecyclerView? = categoryRecycler
private var categoryAdapter: CategoryAdapter? = null
private var productRc: RecyclerView? = productRecycler
private var nomenclatureAdapter: NomenclatureAdapter? = null

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)

    val categoryList: MutableList<Category> = ArrayList()
    categoryList.add(Category(1, "Твёрдый сорт"))
    categoryList.add(Category(2, "Полутвёрдый сорт"))
    categoryList.add(Category(3, "Молодой сорт"))
    setCategoryRecycler(categoryList)

    val productList: MutableList<Nomenclature> = ArrayList()
    productList.add(Nomenclature(1, "Сыр Губернаторский", "100гр", 140))
    setProductRecycler(productList)
}

private fun setProductRecycler(productList: MutableList<Nomenclature>) {
    val productManager: RecyclerView.LayoutManager =
        GridLayoutManager(context, 3)
    productRc?.layoutManager = productManager
    nomenclatureAdapter = NomenclatureAdapter(productList)
    productRc?.adapter = nomenclatureAdapter
    productRc?.adapter?.notifyDataSetChanged()
}

private fun setCategoryRecycler(categoryList: MutableList<Category>) {
    val categoryManager: RecyclerView.LayoutManager =
        LinearLayoutManager(context, RecyclerView.HORIZONTAL, false)
    categoryRc?.layoutManager = categoryManager
    categoryAdapter = CategoryAdapter(categoryList)
    categoryRc?.adapter = categoryAdapter
    categoryRc?.adapter?.notifyDataSetChanged()
}
}

Мой класс NomenclatureAdapter:

class NomenclatureAdapter(private var product_list: MutableList<Nomenclature>) : RecyclerView.Adapter<NomenclatureAdapter.NomenclatureViewHolder>() {

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): NomenclatureViewHolder {
    val productItems = LayoutInflater.from(parent.context).inflate(R.layout.product_item, parent, false)
    return NomenclatureViewHolder(productItems)
}

override fun onBindViewHolder(holder: NomenclatureViewHolder, position: Int) {
    holder.productTitle.text = product_list[position].title
    holder.productUnit.text = product_list[position].unit
    holder.productPrice.text = product_list[position].price_gr.toString()
}

override fun getItemCount(): Int {
    return product_list.size
}

class NomenclatureViewHolder (itemView: View) : RecyclerView.ViewHolder(itemView) {
    var productTitle: TextView = itemView.findViewById(R.id.product_title)
    var productUnit: TextView = itemView.findViewById(R.id.product_unit)
    var productPrice: Button = itemView.findViewById(R.id.btn_add_product)
}
}

Класс CategoryAdapter:

class CategoryAdapter(private var categories: MutableList<Category>) : RecyclerView.Adapter<CategoryViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CategoryViewHolder {
    val categoryItems = LayoutInflater.from(parent.context).inflate(R.layout.category_item, parent, false)
    return CategoryViewHolder(categoryItems)
}

override fun onBindViewHolder(holder: CategoryViewHolder, position: Int) {
    holder.categoryTitle.text = categories[position].title
}

override fun getItemCount(): Int {
    return categories.size
}

class CategoryViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
    var categoryTitle: TextView = itemView.findViewById(R.id.categoryTitle)
}
}

Разметка CatalogFragment:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context=".CatalogFragment"
android:layout_height="match_parent"
android:layout_width="match_parent">

<ImageView
    android:id="@+id/imageView2"
    android:layout_width="50sp"
    android:layout_height="50sp"
    android:src="@drawable/ic______2__1_"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/categoryRecycler"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:background="@color/page_profile_background"
    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
    app:layout_constraintBottom_toBottomOf="@+id/imageView2"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@+id/imageView2"
    app:layout_constraintTop_toTopOf="@+id/imageView2"
    tools:itemCount="2"
    tools:listitem="@layout/category_item" />

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/productRecycler"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:background="@color/text_hint_color"
    app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/categoryRecycler"
    tools:itemCount="2"
    tools:listitem="@layout/product_item" />

</androidx.constraintlayout.widget.ConstraintLayout>

Разметка CategoryItem:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="wrap_content"
android:layout_height="wrap_content">

<TextView
    android:id="@+id/categoryTitle"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/all"
    android:textColor="@color/black"
    android:layout_marginHorizontal="5dp"
    android:textSize="14sp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

Разметка productItem:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content">

<androidx.cardview.widget.CardView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:cardCornerRadius="10sp"
    tools:ignore="MissingConstraints">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:background="#F3D08C">

        <ImageView
            android:id="@+id/product_image"
            android:layout_width="150dp"
            android:layout_height="150dp"
            android:layout_margin="12dp"
            app:srcCompat="@drawable/cheese_gubernatorsky" />

        <TextView
            android:id="@+id/product_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="5dp"
            android:textSize="14sp"
            android:textColor="@color/black"
            android:text="TextView" />

        <TextView
            android:id="@+id/product_unit"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textSize="10sp"
            android:textColor="@color/black"
            android:text="TextView"
            android:layout_marginStart="5dp"
            android:layout_marginTop="5dp"
            android:layout_marginBottom="10dp"/>

        <Button
            android:id="@+id/btn_add_product"
            android:layout_width="140dp"
            android:layout_height="40dp"
            android:layout_gravity="center_horizontal"
            android:background="@drawable/background_button"
            android:text="@string/add_product"
            android:visibility="visible" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:layout_gravity="center"
            android:gravity="center"
            android:visibility="gone"
            android:layout_marginHorizontal="3dp">

            <Button
                android:id="@+id/btn_minus_product"
                android:layout_width="40dp"
                android:layout_height="40dp"
                android:background="@drawable/background_button"
                android:text="-"
                android:textSize="16sp"/>

            <TextView
                android:id="@+id/pr_count"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:layout_marginHorizontal="30dp"
                android:text="1"
                android:textAlignment="center"
                android:textColor="@color/black"
                android:textSize="14sp" />

            <Button
                android:id="@+id/btn_plus_product"
                android:layout_width="40dp"
                android:layout_height="40dp"
                android:background="@drawable/background_button"
                android:text="+"
                android:textSize="16sp"/>

        </LinearLayout>

    </LinearLayout>

</androidx.cardview.widget.CardView>

</androidx.constraintlayout.widget.ConstraintLayout>