java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getLeft()' on a null object reference about flycotablayout HOT 8 OPEN

private List<Fragment> tabs = new ArrayList<>();
private PagerAdapter pagerAdapter;

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment, container, false);
        initTabs();
        return view;
}

private void initTabs() {
        if (pagerAdapter == null) {
            pagerAdapter = new PagerAdapter(getChildFragmentManager());
        }
        if (tabs.isEmpty()) {
            tabs.add(FirstFragment.newInstance());
            tabs.add(SecondFragment.newInstance());
        }
        viewPager.setAdapter(pagerAdapter);
        tabLayout.setTabData(titles);
        tabLayout.setOnTabSelectListener(position -> viewPager.setCurrentItem(position));
        viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
            }

            @Override
            public void onPageSelected(int position) {
                tabLayout.setCurrentTab(position);
            }

            @Override
            public void onPageScrollStateChanged(int state) {
            }
        });
}