I can't find the taskbar that contains the (Song, Scripture, Media, Presentation and Themes) icons. It suddenly disappeared from the screen. Any help, please?

More than likely it was dragged off of the bottom of the screen. You need to place your mouse cursor at the very bottom of EW and drag it back into position.  See the attached video below for a demonstration and notice how the mouse cursor changes when it grabs the side of the bar.

Oh wow! Thank you so much. Just popped back on as it was dragged. Thank you.

My Pleasure.