Mega menu and sub menu problem

I have a problem about mega-menu. First, I click Apparence>Menus then I created new category and sub-category. Later, I select “Make this a category megamenu” and created it. But the problem occur.

Problem:
There is a mega menu but sub menus is under and down of fotos. Sub menu not left of fotos.

What think about tis problem.

Hi

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Thanks!