createStackNavigator and createBottomTabNavigatorin React Navigation v.5

I am new to react native, and i'm using new react-navigation v.5 in my react-native app. When i use createStackNavigator and createBottomTabNavigator together in NavigationContainer i have errors - "undefined is not an object" and "Another navigator is already registered for this container. You likely have multiple navigators under a single "NavigationContainer" or "Screen". Make sure each navigator is under a separate "Screen" container." (in React Navigation v.5). Please tell me where i`m wrong?

AppNavigation.tsx

import React from "react";
import { NavigationContainer } from "@react-navigation/native";
import { createStackNavigator } from "@react-navigation/stack";
import { MainScreen } from "../screens/MainScreen";
import { PostScreen } from "../screens/PostScreen";
import { AboutScreen } from "../screens/AboutScreen";
import { BookedScreen } from "../screens/BookedScreen";
import { CreateScreen } from "../screens/CreateScreen";
import { THEME } from "../theme";
import { Platform } from "react-native";
import { AppHeaderIcon } from "../components/AppHeaderIcon";
import { HeaderButtons, Item } from "react-navigation-header-buttons";
import { createBottomTabNavigator } from "@react-navigation/bottom-tabs";

type RootStackParamList = {
  Main: undefined;
  Post: { postId?: string; date?: string; booked?: boolean };
  About: undefined;
  Booked: undefined;
  Create: undefined;
};

const headerButtons = (title: string, icon: string, callback: () => void) => {
  return (
    <HeaderButtons HeaderButtonComponent={AppHeaderIcon}>
      <Item title={title} iconName={icon} onPress={() => callback()} />
    </HeaderButtons>
  );
};

export const AppNavigation = () => {
  const Stack = createStackNavigator<RootStackParamList>();
  const Tab = createBottomTabNavigator();

  return (
    <NavigationContainer>
      <Stack.Navigator
        initialRouteName="Main"
        screenOptions={{
          headerTintColor:
            Platform.OS === "android" ? "white" : THEME.MAIN_COLOR,
          headerStyle: {
            backgroundColor:
              Platform.OS === "android" ? THEME.MAIN_COLOR : "white"
          }
        }}
      >
        <Stack.Screen
          name="Main"
          component={MainScreen}
          options={{
            headerTitle: "Мой блог",
            headerRight: () =>
              headerButtons("Сделать фото", "ios-camera", () =>
                console.log("Press camera")
              ),
            headerLeft: () =>
              headerButtons("drower", "ios-menu", () =>
                console.log("Press drower button")
              )
          }}
        />
        <Stack.Screen
          name="Post"
          component={PostScreen}
          options={({ route }) => ({
            headerTitle: `Пост от ${new Date(
              route.params.date
            ).toLocaleDateString()}`,
            headerRight: () =>
              headerButtons(
                "star",
                route.params.booked ? "ios-star" : "ios-star-outline",
                () => console.log("Press star button")
              )
          })}
        />
        <Stack.Screen name="About" component={AboutScreen} />
        <Stack.Screen name="Booked" component={BookedScreen} />
        <Stack.Screen name="Create" component={CreateScreen} />
      </Stack.Navigator>
      <Tab.Navigator>
        <Tab.Screen name="Post" component={PostScreen} />
        <Tab.Screen name="Booked" component={BookedScreen} />
      </Tab.Navigator>
    </NavigationContainer>
  );
};

App.tsx

import React, { useState } from "react";
import { AppLoading } from "expo";
import { bootstrap } from "./src/bootstrap";
import { AppNavigation } from "./src/navigation/AppNavigation";

export default function App() {
  const [isReady, setIsReady] = useState(false);

  if (!isReady) {
    //AppLoading - пока не завершится выполнение код дальше не пойдет
    return (
      <AppLoading
        startAsync={bootstrap}
        onFinish={() => setIsReady(true)}
        onError={err => console.log('AppLoading error - ', err)}
      />
    );
  }

  return <AppNavigation />;
}