Area light not illuminating

I am new to blender and following a tutorial on youtube. In the tutorial they used an area light to give light to the scene. I have done the same exact stuff that they have done in the video but my light responds differently to the scene than theirs. Please help!

And what exactly does this image shows us??? The GUI-view could be different because of driver issues. Is there a diff in rendering (diff to what, youtube has how much TerraByte of videos??) Different Blender version? Please help us to help you! (There is even an old thread about that in Support Basic & Interface.)

May need to share the scene, scale issues can cause issues like this