"java.lang.IllegalArgumentException: No view found for id 0x7f090057 for fragment" - Android Fragment

Currently working on an app, which has a MainActivity with a Fragment that contains multiple buttons. I cannot start another activity when clicking on the buttons.

I keep getting an error here saying

java.lang.IllegalArgumentException: No view found for id 0x7f090057 for fragment

I have two classes; a NavigationDrawer class (my MainActivity):

Java --- http://ift.tt/1AnGFeM | XML --- http://ift.tt/1AnGFeO

And a class named StartingFragment (which I want to be the main view when the drawer is closed/not active).

Java --- http://ift.tt/1AnGFeQ XML ---http://ift.tt/142LbTp

Here is the code that the error seems to refer to (from NavDrawer.java):

        /** Swaps fragments in the main content view */
        /** Starts an Activity when item is clicked */
        private void selectItem(int position) {
                // Create a new fragment and specify the tea type
                // to show based on position
                Fragment fragment = new StartingFragment();
                Bundle args = new Bundle();
                args.putInt(StartingFragment.TEA_TYPE_POS, position);
                fragment.setArguments(args);

                // Insert the fragment by replacing any existing fragment
                FragmentManager fragManager = getFragmentManager();
                fragManager.beginTransaction().replace(R.id.fragment_replace, fragment)
                                .commit();

                // Highlight the selected item, update the title, and close the drawer
                mDrawerList.setItemChecked(position, true);
                setTitle(navDrawerTitles[position]);
                navDrawerLayout.closeDrawer(mDrawerList);

        }

I looked at this question here: http://ift.tt/1AnGFeS and I see that R.id.fragment_replace should be a child of the R.layout.nav_drawer, which is the case here. I also posted a very similar question a few days ago, although previously the app would just crash from the start; now it crashes on Button/AlertDialog clicks

However, I don't know what to adjust in my code. I get this error whenever I try to click on a button (and then click on the neutral/positive button of the AlertDialog that follows) from StartingFragment.java & starting_fragment.xml